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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * On-canvas gradient dragging
+ *
+ * Authors:
+ * bulia byak <buliabyak@users.sf.net>
+ * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
+ * Jon A. Cruz <jon@joncruz.org>
+ * Abhishek Sharma
+ * Tavmjong Bah <tavmjong@free.fr>
+ *
+ * Copyright (C) 2007 Johan Engelen
+ * Copyright (C) 2005,2010 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <cstring>
+#include <string>
+
+#include <glibmm/i18n.h>
+
+#include "desktop-style.h"
+#include "desktop.h"
+#include "document-undo.h"
+#include "document.h"
+#include "gradient-chemistry.h"
+#include "gradient-drag.h"
+#include "include/macros.h"
+#include "inkscape.h"
+#include "selection-chemistry.h"
+#include "selection.h"
+#include "snap.h"
+
+#include "display/control/canvas-item-group.h"
+#include "display/control/canvas-item-ctrl.h"
+#include "display/control/canvas-item-curve.h"
+
+#include "object/sp-linear-gradient.h"
+#include "object/sp-mesh-gradient.h"
+#include "object/sp-namedview.h"
+#include "object/sp-radial-gradient.h"
+#include "object/sp-stop.h"
+#include "style.h"
+
+#include "svg/css-ostringstream.h"
+#include "svg/svg.h"
+
+#include "ui/icon-names.h"
+#include "ui/knot/knot.h"
+#include "ui/tools/tool-base.h"
+#include "ui/widget/canvas.h" // Forced redraws
+
+#include "xml/sp-css-attr.h"
+#include "xml/attribute-record.h"
+
+using Inkscape::DocumentUndo;
+using Inkscape::allPaintTargets;
+
+guint32 const GR_KNOT_COLOR_NORMAL = 0xffffff00;
+guint32 const GR_KNOT_COLOR_MOUSEOVER = 0xff000000;
+guint32 const GR_KNOT_COLOR_SELECTED = 0x0000ff00;
+guint32 const GR_KNOT_COLOR_HIGHLIGHT = 0xffffff00;
+guint32 const GR_KNOT_COLOR_MESHCORNER = 0xbfbfbf00;
+
+// absolute distance between gradient points for them to become a single dragger when the drag is created:
+#define MERGE_DIST 0.1
+
+// knot shapes corresponding to GrPointType enum (in sp-gradient.h)
+Inkscape::CanvasItemCtrlShape gr_knot_shapes [] = {
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_SQUARE, // POINT_LG_BEGIN
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE, // POINT_LG_END
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_DIAMOND, // POINT_LG_MID
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_SQUARE, // POINT_RG_CENTER
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE, // POINT_RG_R1
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE, // POINT_RG_R2
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_CROSS, // POINT_RG_FOCUS
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_DIAMOND, // POINT_RG_MID1
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_DIAMOND, // POINT_RG_MID2
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_DIAMOND, // POINT_MG_CORNER
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE, // POINT_MG_HANDLE
+ Inkscape::CANVAS_ITEM_CTRL_SHAPE_SQUARE // POINT_MG_TENSOR
+};
+
+const gchar *gr_knot_descr [] = {
+ N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN
+ N_("Linear gradient <b>end</b>"),
+ N_("Linear gradient <b>mid stop</b>"),
+ N_("Radial gradient <b>center</b>"),
+ N_("Radial gradient <b>radius</b>"),
+ N_("Radial gradient <b>radius</b>"),
+ N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS
+ N_("Radial gradient <b>mid stop</b>"),
+ N_("Radial gradient <b>mid stop</b>"),
+ N_("Mesh gradient <b>corner</b>"),
+ N_("Mesh gradient <b>handle</b>"),
+ N_("Mesh gradient <b>tensor</b>")
+};
+
+static void
+gr_drag_sel_changed(Inkscape::Selection */*selection*/, gpointer data)
+{
+ GrDrag *drag = (GrDrag *) data;
+ drag->updateDraggers ();
+ drag->updateLines ();
+ drag->updateLevels ();
+}
+
+static void gr_drag_sel_modified(Inkscape::Selection */*selection*/, guint /*flags*/, gpointer data)
+{
+ GrDrag *drag = (GrDrag *) data;
+ if (drag->local_change) {
+ drag->refreshDraggers (); // Needed to move mesh handles and toggle visibility
+ drag->local_change = false;
+ } else {
+ drag->updateDraggers ();
+ }
+ drag->updateLines ();
+ drag->updateLevels ();
+}
+
+/**
+ * When a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise
+ * skip), and fill the \a style with the averaged color of all draggables of the selected dragger, if
+ * any.
+ */
+static int gr_drag_style_query(SPStyle *style, int property, gpointer data)
+{
+ GrDrag *drag = (GrDrag *) data;
+
+ if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) {
+ return QUERY_STYLE_NOTHING;
+ }
+
+ if (drag->selected.empty()) {
+ return QUERY_STYLE_NOTHING;
+ } else {
+ int ret = QUERY_STYLE_NOTHING;
+
+ float cf[4];
+ cf[0] = cf[1] = cf[2] = cf[3] = 0;
+
+ SPStop* selected = nullptr;
+ int count = 0;
+ for(auto d : drag->selected) { //for all selected draggers
+ for(auto draggable : d->draggables) { //for all draggables of dragger
+ if (ret == QUERY_STYLE_NOTHING) {
+ ret = QUERY_STYLE_SINGLE;
+ selected = sp_item_gradient_get_stop(draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
+ } else if (ret == QUERY_STYLE_SINGLE) {
+ ret = QUERY_STYLE_MULTIPLE_AVERAGED;
+ }
+
+ guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
+ cf[0] += SP_RGBA32_R_F (c);
+ cf[1] += SP_RGBA32_G_F (c);
+ cf[2] += SP_RGBA32_B_F (c);
+ cf[3] += SP_RGBA32_A_F (c);
+
+ count ++;
+ }
+ }
+
+ if (count) {
+ cf[0] /= count;
+ cf[1] /= count;
+ cf[2] /= count;
+ cf[3] /= count;
+
+ // set both fill and stroke with our stop-color and stop-opacity
+ style->fill.clear();
+ style->fill.setColor( cf[0], cf[1], cf[2] );
+ style->fill.set = TRUE;
+ style->fill.setTag(selected);
+ style->stroke.clear();
+ style->stroke.setColor( cf[0], cf[1], cf[2] );
+ style->stroke.set = TRUE;
+ style->stroke.setTag(selected);
+
+ style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
+ style->fill_opacity.set = TRUE;
+ style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
+ style->stroke_opacity.set = TRUE;
+
+ style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
+ style->opacity.set = TRUE;
+ }
+
+ return ret;
+ }
+}
+
+Glib::ustring GrDrag::makeStopSafeColor( gchar const *str, bool &isNull )
+{
+ Glib::ustring colorStr;
+ if ( str ) {
+ isNull = false;
+ colorStr = str;
+ Glib::ustring::size_type pos = colorStr.find("url(#");
+ if ( pos != Glib::ustring::npos ) {
+ Glib::ustring targetName = colorStr.substr(pos + 5, colorStr.length() - 6);
+ std::vector<SPObject *> gradients = desktop->doc()->getResourceList("gradient");
+ for (auto gradient : gradients) {
+ SPGradient* grad = SP_GRADIENT(gradient);
+ if ( targetName == grad->getId() ) {
+ SPGradient *vect = grad->getVector();
+ SPStop *firstStop = (vect) ? vect->getFirstStop() : grad->getFirstStop();
+ if (firstStop) {
+ Glib::ustring stopColorStr = firstStop->getColor().toString();
+ if ( !stopColorStr.empty() ) {
+ colorStr = stopColorStr;
+ }
+ }
+ break;
+ }
+ }
+ }
+ } else {
+ isNull = true;
+ }
+
+ return colorStr;
+}
+
+bool GrDrag::styleSet( const SPCSSAttr *css, bool switch_style)
+{
+ if (selected.empty()) {
+ return false;
+ }
+
+ SPCSSAttr *stop = sp_repr_css_attr_new();
+
+ // See if the css contains interesting properties, and if so, translate them into the format
+ // acceptable for gradient stops
+
+ // any of color properties, in order of increasing priority:
+ if (css->attribute("flood-color")) {
+ sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
+ }
+
+ if (css->attribute("lighting-color")) {
+ sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
+ }
+
+ if (css->attribute("color")) {
+ sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
+ }
+
+ if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none")) {
+ sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
+ }
+
+ if (css->attribute("fill") && strcmp(css->attribute("fill"), "none")) {
+ sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
+ }
+
+ if (css->attribute("stop-color")) {
+ sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
+ }
+
+ // Make sure the style is allowed for gradient stops.
+ if ( !sp_repr_css_property_is_unset( stop, "stop-color") ) {
+ bool stopIsNull = false;
+ Glib::ustring tmp = makeStopSafeColor( sp_repr_css_property( stop, "stop-color", "" ), stopIsNull );
+ if ( !stopIsNull && !tmp.empty() ) {
+ sp_repr_css_set_property( stop, "stop-color", tmp.c_str() );
+ }
+ }
+
+
+ if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
+ sp_repr_css_set_property(stop, "stop-opacity", css->attribute("stop-opacity"));
+ } else { // multiply all opacity properties:
+ gdouble accumulated = 1.0;
+ accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
+ accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
+ accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
+ accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
+
+ Inkscape::CSSOStringStream os;
+ os << accumulated;
+ sp_repr_css_set_property(stop, "stop-opacity", os.str().c_str());
+
+ if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
+ (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none"))) {
+ sp_repr_css_set_property(stop, "stop-opacity", "0"); // if a single fill/stroke property is set to none, don't change color, set opacity to 0
+ }
+ }
+
+ const auto& al = stop->attributeList();
+ if (al.empty()) { // nothing for us here, pass it on
+ sp_repr_css_attr_unref(stop);
+ return false;
+ }
+
+ for(auto d : selected) { //for all selected draggers
+ for(auto draggable : d->draggables) { //for all draggables of dragger
+ SPGradient* gradient = getGradient(draggable->item, draggable->fill_or_stroke);
+
+ // for linear and radial gradients F&S dialog deals with stops' colors;
+ // don't handle style notifications, or else it will not be possible to switch
+ // object style back to solid color
+ if (switch_style && gradient && SP_IS_GRADIENT(gradient) &&
+ (SP_IS_LINEARGRADIENT(gradient) || SP_IS_RADIALGRADIENT(gradient))) {
+ continue;
+ }
+
+ local_change = true;
+ sp_item_gradient_stop_set_style(draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
+ }
+ }
+
+ //sp_repr_css_print(stop);
+ sp_repr_css_attr_unref(stop);
+ return local_change; // true if handled
+}
+
+guint32 GrDrag::getColor()
+{
+ if (selected.empty()) return 0;
+
+ float cf[4];
+ cf[0] = cf[1] = cf[2] = cf[3] = 0;
+
+ int count = 0;
+
+ for(auto d : selected) { //for all selected draggers
+ for(auto draggable : d->draggables) { //for all draggables of dragger
+ guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
+ cf[0] += SP_RGBA32_R_F (c);
+ cf[1] += SP_RGBA32_G_F (c);
+ cf[2] += SP_RGBA32_B_F (c);
+ cf[3] += SP_RGBA32_A_F (c);
+
+ count ++;
+ }
+ }
+
+ if (count) {
+ cf[0] /= count;
+ cf[1] /= count;
+ cf[2] /= count;
+ cf[3] /= count;
+ }
+
+ return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
+}
+
+// TODO refactor early returns
+SPStop *GrDrag::addStopNearPoint(SPItem *item, Geom::Point mouse_p, double tolerance)
+{
+ gfloat new_stop_offset = 0; // type of SPStop.offset = gfloat
+ SPGradient *gradient = nullptr;
+ //bool r1_knot = false;
+
+ // For Mesh
+ int divide_row = -1;
+ int divide_column = -1;
+ double divide_coord = 0.5;
+
+ bool addknot = false;
+
+ for (std::vector<Inkscape::PaintTarget>::const_iterator it = allPaintTargets().begin(); (it != allPaintTargets().end()) && !addknot; ++it)
+ {
+ Inkscape::PaintTarget fill_or_stroke = *it;
+ gradient = getGradient(item, fill_or_stroke);
+ if (SP_IS_LINEARGRADIENT(gradient)) {
+ Geom::Point begin = getGradientCoords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
+ Geom::Point end = getGradientCoords(item, POINT_LG_END, 0, fill_or_stroke);
+ Geom::LineSegment ls(begin, end);
+ double offset = ls.nearestTime(mouse_p);
+ Geom::Point nearest = ls.pointAt(offset);
+ double dist_screen = Geom::distance(mouse_p, nearest);
+ if ( dist_screen < tolerance ) {
+ // calculate the new stop offset
+ new_stop_offset = distance(begin, nearest) / distance(begin, end);
+ // add the knot
+ addknot = true;
+ }
+ } else if (SP_IS_RADIALGRADIENT(gradient)) {
+ Geom::Point begin = getGradientCoords(item, POINT_RG_CENTER, 0, fill_or_stroke);
+ Geom::Point end = getGradientCoords(item, POINT_RG_R1, 0, fill_or_stroke);
+ Geom::LineSegment ls(begin, end);
+ double offset = ls.nearestTime(mouse_p);
+ Geom::Point nearest = ls.pointAt(offset);
+ double dist_screen = Geom::distance(mouse_p, nearest);
+ if ( dist_screen < tolerance ) {
+ // calculate the new stop offset
+ new_stop_offset = distance(begin, nearest) / distance(begin, end);
+ // add the knot
+ addknot = true;
+ //r1_knot = true;
+ } else {
+ end = getGradientCoords(item, POINT_RG_R2, 0, fill_or_stroke);
+ ls = Geom::LineSegment(begin, end);
+ offset = ls.nearestTime(mouse_p);
+ nearest = ls.pointAt(offset);
+ dist_screen = Geom::distance(mouse_p, nearest);
+ if ( dist_screen < tolerance ) {
+ // calculate the new stop offset
+ new_stop_offset = distance(begin, nearest) / distance(begin, end);
+ // add the knot
+ addknot = true;
+ //r1_knot = false;
+ }
+ }
+ } else if (SP_IS_MESHGRADIENT(gradient)) {
+
+ // add_stop_near_point()
+ // Find out which curve pointer is over and use that curve to determine
+ // which row or column will be divided.
+ // This is silly as we already should know which line we are over...
+ // but that information is not saved (sp_gradient_context_is_over_line).
+
+ SPMeshGradient *mg = SP_MESHGRADIENT(gradient);
+ Geom::Affine transform = Geom::Affine(mg->gradientTransform)*(Geom::Affine)item->i2dt_affine();
+
+ guint rows = mg->array.patch_rows();
+ guint columns = mg->array.patch_columns();
+
+ double closest = 1e10;
+ for( guint i = 0; i < rows; ++i ) {
+ for( guint j = 0; j < columns; ++j ) {
+
+ SPMeshPatchI patch( &(mg->array.nodes), i, j );
+ Geom::Point p[4];
+
+ // Top line
+ {
+ p[0] = patch.getPoint( 0, 0 ) * transform;
+ p[1] = patch.getPoint( 0, 1 ) * transform;
+ p[2] = patch.getPoint( 0, 2 ) * transform;
+ p[3] = patch.getPoint( 0, 3 ) * transform;
+ Geom::BezierCurveN<3> b( p[0], p[1], p[2], p[3] );
+ Geom::Coord coord = b.nearestTime( mouse_p );
+ Geom::Point nearest = b( coord );
+ double dist_screen = Geom::L2 ( mouse_p - nearest );
+ if ( dist_screen < closest ) {
+ closest = dist_screen;
+ divide_row = -1;
+ divide_column = j;
+ divide_coord = coord;
+ }
+ }
+
+ // Right line (only for last column)
+ if( j == columns - 1 ) {
+ p[0] = patch.getPoint( 1, 0 ) * transform;
+ p[1] = patch.getPoint( 1, 1 ) * transform;
+ p[2] = patch.getPoint( 1, 2 ) * transform;
+ p[3] = patch.getPoint( 1, 3 ) * transform;
+ Geom::BezierCurveN<3> b( p[0], p[1], p[2], p[3] );
+ Geom::Coord coord = b.nearestTime( mouse_p );
+ Geom::Point nearest = b( coord );
+ double dist_screen = Geom::L2 ( mouse_p - nearest );
+ if ( dist_screen < closest ) {
+ closest = dist_screen;
+ divide_row = i;
+ divide_column = -1;
+ divide_coord = coord;
+ }
+ }
+
+ // Bottom line (only for last row)
+ if( i == rows - 1 ) {
+ p[0] = patch.getPoint( 2, 0 ) * transform;
+ p[1] = patch.getPoint( 2, 1 ) * transform;
+ p[2] = patch.getPoint( 2, 2 ) * transform;
+ p[3] = patch.getPoint( 2, 3 ) * transform;
+ Geom::BezierCurveN<3> b( p[0], p[1], p[2], p[3] );
+ Geom::Coord coord = b.nearestTime( mouse_p );
+ Geom::Point nearest = b( coord );
+ double dist_screen = Geom::L2 ( mouse_p - nearest );
+ if ( dist_screen < closest ) {
+ closest = dist_screen;
+ divide_row = -1;
+ divide_column = j;
+ divide_coord = 1.0 - coord;
+ }
+ }
+
+ // Left line
+ {
+ p[0] = patch.getPoint( 3, 0 ) * transform;
+ p[1] = patch.getPoint( 3, 1 ) * transform;
+ p[2] = patch.getPoint( 3, 2 ) * transform;
+ p[3] = patch.getPoint( 3, 3 ) * transform;
+ Geom::BezierCurveN<3> b( p[0], p[1], p[2], p[3] );
+ Geom::Coord coord = b.nearestTime( mouse_p );
+ Geom::Point nearest = b( coord );
+ double dist_screen = Geom::L2 ( mouse_p - nearest );
+ if ( dist_screen < closest ) {
+ closest = dist_screen;
+ divide_row = i;
+ divide_column = -1;
+ divide_coord = 1.0 - coord;
+ }
+ }
+
+ } // End loop over columns
+ } // End loop rows
+
+ if( closest < tolerance ) {
+ addknot = true;
+ }
+
+ } // End if mesh
+
+ }
+
+ if (addknot) {
+
+ if( SP_IS_LINEARGRADIENT(gradient) || SP_IS_RADIALGRADIENT( gradient ) ) {
+ SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
+ SPStop* prev_stop = vector->getFirstStop();
+ SPStop* next_stop = prev_stop->getNextStop();
+ guint i = 1;
+ while ( (next_stop) && (next_stop->offset < new_stop_offset) ) {
+ prev_stop = next_stop;
+ next_stop = next_stop->getNextStop();
+ i++;
+ }
+ if (!next_stop) {
+ // logical error: the endstop should have offset 1 and should always be more than this offset here
+ return nullptr;
+ }
+
+
+ SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, new_stop_offset);
+ gradient->ensureVector();
+ updateDraggers();
+
+ // so that it does not automatically update draggers in idle loop, as this would deselect
+ local_change = true;
+
+ // select the newly created stop
+ selectByStop(newstop);
+
+ return newstop;
+
+ } else {
+
+ SPMeshGradient *mg = SP_MESHGRADIENT(gradient);
+
+ if( divide_row > -1 ) {
+ mg->array.split_row( divide_row, divide_coord );
+ } else {
+ mg->array.split_column( divide_column, divide_coord );
+ }
+
+ // Update repr
+ mg->array.write( mg );
+ mg->array.built = false;
+ mg->ensureArray();
+ // How do we do this?
+ DocumentUndo::done(desktop->getDocument(), _("Added patch row or column"), INKSCAPE_ICON("mesh-gradient"));
+
+ } // Mesh
+ }
+
+ return nullptr;
+}
+
+
+bool GrDrag::dropColor(SPItem */*item*/, gchar const *c, Geom::Point p)
+{
+ // Note: not sure if a null pointer can come in for the style, but handle that just in case
+ bool stopIsNull = false;
+ Glib::ustring toUse = makeStopSafeColor( c, stopIsNull );
+
+ // first, see if we can drop onto one of the existing draggers
+ for(auto d : draggers) { //for all draggers
+ if (Geom::L2(p - d->point)*desktop->current_zoom() < 5) {
+ SPCSSAttr *stop = sp_repr_css_attr_new ();
+ sp_repr_css_set_property( stop, "stop-color", stopIsNull ? nullptr : toUse.c_str() );
+ sp_repr_css_set_property( stop, "stop-opacity", "1" );
+ for(auto draggable : d->draggables) { //for all draggables of dragger
+ local_change = true;
+ sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
+ }
+ sp_repr_css_attr_unref(stop);
+ return true;
+ }
+ }
+
+ // now see if we're over line and create a new stop
+ for (auto curve : item_curves) {
+ if (curve->is_line() && curve->get_item() && curve->contains(p, 5)) {
+ SPStop *stop = addStopNearPoint(curve->get_item(), p, 5/desktop->current_zoom());
+ if (stop) {
+ SPCSSAttr *css = sp_repr_css_attr_new();
+ sp_repr_css_set_property( css, "stop-color", stopIsNull ? nullptr : toUse.c_str() );
+ sp_repr_css_set_property( css, "stop-opacity", "1" );
+ sp_repr_css_change(stop->getRepr(), css, "style");
+ return true;
+ }
+ }
+ }
+
+ return false;
+}
+
+
+GrDrag::GrDrag(SPDesktop *desktop) :
+ keep_selection(false),
+ local_change(false),
+ desktop(desktop),
+ hor_levels(),
+ vert_levels(),
+ draggers(0),
+ selection(desktop->getSelection()),
+ sel_changed_connection(),
+ sel_modified_connection(),
+ style_set_connection(),
+ style_query_connection()
+{
+ sel_changed_connection = selection->connectChangedFirst(
+ sigc::bind(
+ sigc::ptr_fun(&gr_drag_sel_changed),
+ (gpointer)this )
+
+ );
+ sel_modified_connection = selection->connectModifiedFirst(
+ sigc::bind(
+ sigc::ptr_fun(&gr_drag_sel_modified),
+ (gpointer)this )
+ );
+
+ style_set_connection = desktop->connectSetStyleEx( sigc::mem_fun(*this, &GrDrag::styleSet) );
+
+ style_query_connection = desktop->connectQueryStyle(
+ sigc::bind(
+ sigc::ptr_fun(&gr_drag_style_query),
+ (gpointer)this )
+ );
+
+ updateDraggers();
+ updateLines();
+ updateLevels();
+
+ if (desktop->gr_item) {
+ GrDragger *dragger = getDraggerFor(desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke);
+ if (dragger) {
+ setSelected(dragger);
+ }
+ }
+}
+
+GrDrag::~GrDrag()
+{
+ this->sel_changed_connection.disconnect();
+ this->sel_modified_connection.disconnect();
+ this->style_set_connection.disconnect();
+ this->style_query_connection.disconnect();
+
+ if (! this->selected.empty()) {
+ GrDraggable *draggable = (*(this->selected.begin()))->draggables[0];
+ desktop->gr_item = draggable->item;
+ desktop->gr_point_type = draggable->point_type;
+ desktop->gr_point_i = draggable->point_i;
+ desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
+ } else {
+ desktop->gr_item = nullptr;
+ desktop->gr_point_type = POINT_LG_BEGIN;
+ desktop->gr_point_i = 0;
+ desktop->gr_fill_or_stroke = Inkscape::FOR_FILL;
+ }
+
+ deselect_all();
+ for (auto dragger : this->draggers) {
+ delete dragger;
+ }
+ this->draggers.clear();
+ this->selected.clear();
+
+ for (auto curve : item_curves) {
+ delete curve;
+ }
+ item_curves.clear();
+}
+
+GrDraggable::GrDraggable(SPItem *item, GrPointType point_type, guint point_i, Inkscape::PaintTarget fill_or_stroke) :
+ item(item),
+ point_type(point_type),
+ point_i(point_i),
+ fill_or_stroke(fill_or_stroke)
+{
+ //g_object_ref(G_OBJECT(item));
+ sp_object_ref(item);
+}
+
+GrDraggable::~GrDraggable()
+{
+ //g_object_unref (G_OBJECT (this->item));
+ sp_object_unref(this->item);
+}
+
+
+SPObject *GrDraggable::getServer()
+{
+ SPObject *server = nullptr;
+ if (item) {
+ switch (fill_or_stroke) {
+ case Inkscape::FOR_FILL:
+ server = item->style->getFillPaintServer();
+ break;
+ case Inkscape::FOR_STROKE:
+ server = item->style->getStrokePaintServer();
+ break;
+ }
+ }
+
+ return server;
+}
+
+static void gr_knot_moved_handler(SPKnot *knot, Geom::Point const &ppointer, guint state, gpointer data)
+{
+ GrDragger *dragger = (GrDragger *) data;
+
+ // Dragger must have at least one draggable
+ GrDraggable *draggable = (GrDraggable *) dragger->draggables[0];
+ if (!draggable) return;
+
+ // Find mesh corner that corresponds to dragger (only checks first draggable) and highlight it.
+ GrDragger *dragger_corner = dragger->getMgCorner();
+ if (dragger_corner) {
+ dragger_corner->highlightCorner(true);
+ }
+
+ // Set-up snapping
+ SPDesktop *desktop = dragger->parent->desktop;
+ SnapManager &m = desktop->namedview->snap_manager;
+ double snap_dist = m.snapprefs.getObjectTolerance() / dragger->parent->desktop->current_zoom();
+
+ Geom::Point p = ppointer;
+
+ if (state & GDK_SHIFT_MASK) {
+ // with Shift; unsnap if we carry more than one draggable
+ if (dragger->draggables.size()>1) {
+ // create a new dragger
+ GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, nullptr);
+ dragger->parent->draggers.insert(dragger->parent->draggers.begin(), dr_new);
+ // relink to it all but the first draggable in the list
+ std::vector<GrDraggable *>::const_iterator i = dragger->draggables.begin();
+ for ( ++i ; i != dragger->draggables.end(); ++i ) {
+ GrDraggable *draggable = *i;
+ dr_new->addDraggable (draggable);
+ }
+ dr_new->updateKnotShape();
+ if(dragger->draggables.size()>1){
+ GrDraggable *tmp = dragger->draggables[0];
+ dragger->draggables.clear();
+ dragger->draggables.push_back(tmp);
+ }
+ dragger->updateKnotShape();
+ dragger->updateTip();
+ }
+ } else if (!(state & GDK_CONTROL_MASK)) {
+ // without Shift or Ctrl; see if we need to snap to another dragger
+ for (std::vector<GrDragger *>::const_iterator di = dragger->parent->draggers.begin(); di != dragger->parent->draggers.end() ; ++di) {
+ GrDragger *d_new = *di;
+ if (dragger->mayMerge(d_new) && Geom::L2 (d_new->point - p) < snap_dist) {
+
+ // Merge draggers:
+ for (auto draggable : dragger->draggables) {
+ // copy draggable to d_new:
+ GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
+ d_new->addDraggable (da_new);
+ }
+
+ // unlink and delete this dragger
+ dragger->parent->draggers.erase(std::remove(dragger->parent->draggers.begin(),dragger->parent->draggers.end(), dragger),dragger->parent->draggers.end());
+ d_new->parent->draggers.erase(std::remove(d_new->parent->draggers.begin(),d_new->parent->draggers.end(), dragger),d_new->parent->draggers.end());
+ d_new->parent->selected.erase(dragger);
+ delete dragger;
+
+ // throw out delayed snap context
+ desktop->event_context->discard_delayed_snap_event();
+
+ // update the new merged dragger
+ d_new->fireDraggables(true, false, true);
+ d_new->parent->updateLines();
+ d_new->parent->setSelected (d_new);
+ d_new->updateKnotShape ();
+ d_new->updateTip ();
+ d_new->updateDependencies(true);
+ DocumentUndo::done(d_new->parent->desktop->getDocument(), _("Merge gradient handles"), INKSCAPE_ICON("color-gradient"));
+ return;
+ }
+ }
+ }
+
+ if (!((state & GDK_SHIFT_MASK) || (state & GDK_CONTROL_MASK))) {
+ m.setup(desktop);
+ Inkscape::SnappedPoint s = m.freeSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE));
+ m.unSetup();
+ if (s.getSnapped()) {
+ p = s.getPoint();
+ knot->moveto(p);
+ }
+ } else if (state & GDK_CONTROL_MASK) {
+ IntermSnapResults isr;
+ Inkscape::SnapCandidatePoint scp = Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE);
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ unsigned snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
+ /* 0 means no snapping. */
+
+ for (std::vector<GrDraggable *>::const_iterator i = dragger->draggables.begin(); i != dragger->draggables.end(); ++i) {
+ GrDraggable *draggable = *i;
+
+ Geom::Point dr_snap(Geom::infinity(), Geom::infinity());
+
+ if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
+ for (std::vector<GrDragger *>::const_iterator di = dragger->parent->draggers.begin() ; di != dragger->parent->draggers.end() ; ++di) {
+ GrDragger *d_new = *di;
+ if (d_new == dragger)
+ continue;
+ if (d_new->isA (draggable->item,
+ draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
+ draggable->fill_or_stroke)) {
+ // found the other end of the linear gradient;
+ if (state & GDK_SHIFT_MASK) {
+ // moving linear around center
+ Geom::Point center = Geom::Point (0.5*(d_new->point + dragger->point));
+ dr_snap = center;
+ } else {
+ // moving linear around the other end
+ dr_snap = d_new->point;
+ }
+ }
+ }
+ } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
+ for (std::vector<GrDragger *>::const_iterator di = dragger->parent->draggers.begin(); di != dragger->parent->draggers.end(); ++di) {
+ GrDragger *d_new = *di;
+ if (d_new == dragger)
+ continue;
+ if (d_new->isA (draggable->item,
+ POINT_RG_CENTER,
+ draggable->fill_or_stroke)) {
+ // found the center of the radial gradient;
+ dr_snap = d_new->point;
+ }
+ }
+ } else if (draggable->point_type == POINT_RG_CENTER) {
+ // radial center snaps to hor/vert relative to its original position
+ dr_snap = dragger->point_original;
+ } else if (draggable->point_type == POINT_MG_CORNER ||
+ draggable->point_type == POINT_MG_HANDLE ||
+ draggable->point_type == POINT_MG_TENSOR ) {
+ // std::cout << " gr_knot_moved_handler: Got mesh point!" << std::endl;
+ }
+
+ // dr_snap contains the origin of the gradient, whereas p will be the new endpoint which we will try to snap now
+ Inkscape::SnappedPoint sp;
+ if (dr_snap.isFinite()) {
+ m.setup(desktop);
+ if (state & GDK_MOD1_MASK) {
+ // with Alt, snap to the original angle and its perpendiculars
+ sp = m.constrainedAngularSnap(scp, dragger->point_original, dr_snap, 2);
+ } else {
+ // with Ctrl, snap to M_PI/snaps
+ sp = m.constrainedAngularSnap(scp, std::optional<Geom::Point>(), dr_snap, snaps);
+ }
+ m.unSetup();
+ isr.points.push_back(sp);
+ }
+ }
+
+ m.setup(desktop, false); // turn of the snap indicator temporarily
+ Inkscape::SnappedPoint bsp = m.findBestSnap(scp, isr, true);
+ m.unSetup();
+ if (!bsp.getSnapped()) {
+ // If we didn't truly snap to an object or to a grid, then we will still have to look for the
+ // closest projection onto one of the constraints. findBestSnap() will not do this for us
+ for (std::list<Inkscape::SnappedPoint>::const_iterator i = isr.points.begin(); i != isr.points.end(); ++i) {
+ if (i == isr.points.begin() || (Geom::L2((*i).getPoint() - p) < Geom::L2(bsp.getPoint() - p))) {
+ bsp.setPoint((*i).getPoint());
+ bsp.setTarget(Inkscape::SNAPTARGET_CONSTRAINED_ANGLE);
+ }
+ }
+ }
+ //p = isr.points.front().getPoint();
+ p = bsp.getPoint();
+ knot->moveto(p);
+ }
+
+ GrDrag *drag = dragger->parent; // There is just one GrDrag.
+ drag->keep_selection = (drag->selected.find(dragger)!=drag->selected.end());
+ bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
+
+ if (drag->keep_selection) {
+ Geom::Point diff = p - dragger->point;
+ drag->selected_move_nowrite (diff[Geom::X], diff[Geom::Y], scale_radial);
+ } else {
+ Geom::Point p_old = dragger->point;
+ dragger->point = p;
+ dragger->fireDraggables (false, scale_radial);
+ dragger->updateDependencies(false);
+ dragger->moveMeshHandles( p_old, MG_NODE_NO_SCALE );
+ }
+}
+
+
+static void gr_midpoint_limits(GrDragger *dragger, SPObject *server, Geom::Point *begin, Geom::Point *end, Geom::Point *low_lim, Geom::Point *high_lim, std::vector<GrDragger *> &moving)
+{
+
+ GrDrag *drag = dragger->parent;
+ // a midpoint dragger can (logically) only contain one GrDraggable
+ GrDraggable *draggable = dragger->draggables[0];
+
+ // get begin and end points between which dragging is allowed:
+ // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
+ moving.push_back(dragger);
+
+ guint lowest_i = draggable->point_i;
+ guint highest_i = draggable->point_i;
+ GrDragger *lowest_dragger = dragger;
+ GrDragger *highest_dragger = dragger;
+ if (dragger->isSelected()) {
+ GrDragger* d_add;
+ while ( true )
+ {
+ d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
+ if ( d_add && drag->selected.find(d_add)!=drag->selected.end() ) {
+ lowest_i = lowest_i - 1;
+ moving.insert(moving.begin(),d_add);
+ lowest_dragger = d_add;
+ } else {
+ break;
+ }
+ }
+
+ while ( true )
+ {
+ d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
+ if ( d_add && drag->selected.find(d_add)!=drag->selected.end() ) {
+ highest_i = highest_i + 1;
+ moving.push_back(d_add);
+ highest_dragger = d_add;
+ } else {
+ break;
+ }
+ }
+ }
+
+ if ( SP_IS_LINEARGRADIENT(server) ) {
+ guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
+ GrDragger *d_temp;
+ if (lowest_i == 1) {
+ d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
+ } else {
+ d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
+ }
+ if (d_temp)
+ *begin = d_temp->point;
+
+ d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
+ if (d_temp == nullptr) {
+ d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
+ }
+ if (d_temp)
+ *end = d_temp->point;
+ } else if ( SP_IS_RADIALGRADIENT(server) ) {
+ guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
+ GrDragger *d_temp;
+ if (lowest_i == 1) {
+ d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
+ } else {
+ d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
+ }
+ if (d_temp)
+ *begin = d_temp->point;
+
+ d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
+ if (d_temp == nullptr) {
+ d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
+ }
+ if (d_temp)
+ *end = d_temp->point;
+ }
+
+ *low_lim = dragger->point - (lowest_dragger->point - *begin);
+ *high_lim = dragger->point - (highest_dragger->point - *end);
+}
+
+/**
+ * Called when a midpoint knot is dragged.
+ */
+static void gr_knot_moved_midpoint_handler(SPKnot */*knot*/, Geom::Point const &ppointer, guint state, gpointer data)
+{
+ GrDragger *dragger = (GrDragger *) data;
+ GrDrag *drag = dragger->parent;
+ // a midpoint dragger can (logically) only contain one GrDraggable
+ GrDraggable *draggable = dragger->draggables[0];
+
+ // FIXME: take from prefs
+ double snap_fraction = 0.1;
+
+ Geom::Point p = ppointer;
+ Geom::Point begin(0,0), end(0,0);
+ Geom::Point low_lim(0,0), high_lim(0,0);
+
+ SPObject *server = draggable->getServer();
+
+ std::vector<GrDragger *> moving;
+ gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, moving);
+
+ if (state & GDK_CONTROL_MASK) {
+ Geom::LineSegment ls(low_lim, high_lim);
+ p = ls.pointAt(round(ls.nearestTime(p) / snap_fraction) * snap_fraction);
+ } else {
+ Geom::LineSegment ls(low_lim, high_lim);
+ p = ls.pointAt(ls.nearestTime(p));
+ if (!(state & GDK_SHIFT_MASK)) {
+ Inkscape::Snapper::SnapConstraint cl(low_lim, high_lim - low_lim);
+ SPDesktop *desktop = dragger->parent->desktop;
+ SnapManager &m = desktop->namedview->snap_manager;
+ m.setup(desktop);
+ m.constrainedSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE, cl);
+ m.unSetup();
+ }
+ }
+ Geom::Point displacement = p - dragger->point;
+
+ for (auto drg : moving) {
+ SPKnot *drgknot = drg->knot;
+ Geom::Point this_move = displacement;
+ if (state & GDK_MOD1_MASK) {
+ // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
+ double alpha = 1.0;
+ if (Geom::L2(drg->point - dragger->point) + Geom::L2(drg->point - begin) - 1e-3 > Geom::L2(dragger->point - begin)) { // drg is on the end side from dragger
+ double x = Geom::L2(drg->point - dragger->point)/Geom::L2(end - dragger->point);
+ this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
+ } else { // drg is on the begin side from dragger
+ double x = Geom::L2(drg->point - dragger->point)/Geom::L2(begin - dragger->point);
+ this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
+ }
+ }
+ drg->point += this_move;
+ drgknot->moveto(drg->point);
+ drg->fireDraggables (false);
+ drg->updateDependencies(false);
+ }
+
+ drag->keep_selection = dragger->isSelected();
+}
+
+
+
+static void gr_knot_mousedown_handler(SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
+{
+ GrDragger *dragger = (GrDragger *) data;
+ GrDrag *drag = dragger->parent;
+
+ // Turn off all mesh handle highlighting
+ for(auto d : drag->draggers) { //for all selected draggers
+ d->highlightCorner(false);
+ }
+
+ // Highlight only mesh corner corresponding to grabbed corner or handle
+ GrDragger *dragger_corner = dragger->getMgCorner();
+ if (dragger_corner) {
+ dragger_corner->highlightCorner(true);
+ }
+}
+
+/**
+ * Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed.
+ */
+static void gr_knot_ungrabbed_handler(SPKnot *knot, unsigned int state, gpointer data)
+{
+ GrDragger *dragger = (GrDragger *) data;
+
+ dragger->point_original = dragger->point = knot->pos;
+
+ if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
+ dragger->fireDraggables (true, true);
+ } else {
+ dragger->fireDraggables (true);
+ }
+ dragger->moveMeshHandles( dragger->point_original, MG_NODE_NO_SCALE );
+
+ for (std::set<GrDragger *>::const_iterator it = dragger->parent->selected.begin(); it != dragger->parent->selected.end() ; ++it ) {
+ if (*it == dragger)
+ continue;
+ (*it)->fireDraggables (true);
+ }
+
+ // make this dragger selected
+ if (!dragger->parent->keep_selection) {
+ dragger->parent->setSelected (dragger);
+ }
+ dragger->parent->keep_selection = false;
+
+ dragger->updateDependencies(true);
+
+ // we did an undoable action
+ DocumentUndo::done(dragger->parent->desktop->getDocument(), _("Move gradient handle"), INKSCAPE_ICON("color-gradient"));
+}
+
+/**
+ * Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
+ * state of the keyboard keys.
+ */
+static void gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
+{
+ GrDragger *dragger = (GrDragger *) data;
+ GrDraggable *draggable = dragger->draggables[0];
+ if (!draggable) return;
+
+ if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
+ // delete this knot from vector
+ SPGradient *gradient = getGradient(draggable->item, draggable->fill_or_stroke);
+ gradient = gradient->getVector();
+ if (gradient->vector.stops.size() > 2) { // 2 is the minimum
+ SPStop *stop = nullptr;
+ switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
+
+ case POINT_LG_BEGIN:
+ case POINT_RG_CENTER:
+ stop = gradient->getFirstStop();
+ {
+ SPStop *next = stop->getNextStop();
+ if (next) {
+ next->offset = 0;
+ next->getRepr()->setAttributeCssDouble("offset", 0);
+ }
+ }
+ break;
+
+ case POINT_LG_END:
+ case POINT_RG_R1:
+ case POINT_RG_R2:
+ stop = sp_last_stop(gradient);
+ {
+ SPStop *prev = stop->getPrevStop();
+ if (prev) {
+ prev->offset = 1;
+ prev->getRepr()->setAttributeCssDouble("offset", 1);
+ }
+ }
+ break;
+
+ case POINT_LG_MID:
+ case POINT_RG_MID1:
+ case POINT_RG_MID2:
+ stop = sp_get_stop_i(gradient, draggable->point_i);
+ break;
+
+ default:
+ return;
+
+ }
+
+ gradient->getRepr()->removeChild(stop->getRepr());
+ DocumentUndo::done(gradient->document, _("Delete gradient stop"), INKSCAPE_ICON("color-gradient"));
+ }
+ } else {
+ // select the dragger
+
+ dragger->point_original = dragger->point;
+
+ if ( state & GDK_SHIFT_MASK ) {
+ dragger->parent->setSelected (dragger, true, false);
+ } else {
+ dragger->parent->setSelected (dragger);
+ }
+ }
+}
+
+/**
+ * Called when a dragger knot is doubleclicked;
+ */
+static void gr_knot_doubleclicked_handler(SPKnot */*knot*/, guint /*state*/, gpointer data)
+{
+ GrDragger *dragger = (GrDragger *) data;
+
+ dragger->point_original = dragger->point;
+
+ if (dragger->draggables.empty())
+ return;
+}
+
+/**
+ * Act upon all draggables of the dragger, setting them to the dragger's point.
+ */
+void GrDragger::fireDraggables(bool write_repr, bool scale_radial, bool merging_focus)
+{
+ for (auto draggable : this->draggables) {
+ // set local_change flag so that selection_changed callback does not regenerate draggers
+ this->parent->local_change = true;
+
+ // change gradient, optionally writing to repr; prevent focus from moving if it's snapped
+ // to the center, unless it's the first update upon merge when we must snap it to the point
+ if (merging_focus ||
+ !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
+ {
+ sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
+ }
+ }
+}
+
+// TODO: REMOVE THIS
+void GrDragger::updateControlSizesOverload(SPKnot * knot)
+{
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ int size = prefs->getIntLimited("/options/grabsize/value", 3, 1, 15);
+
+ // shadow what's done in CanvasItemCtrl::set_size_via_index;
+ // TODO: code should likely be merged
+ int knot_size = size * 2 + 3;
+ if(knot->shape == Inkscape::CANVAS_ITEM_CTRL_SHAPE_TRIANGLE) {
+ knot_size = size * 8 + 1;
+ }
+
+ knot->setSize(knot_size);
+}
+
+void GrDragger::updateControlSizes()
+{
+ updateControlSizesOverload(this->knot);
+ this->knot->updateCtrl();
+ this->updateKnotShape();
+}
+
+/**
+ * Checks if the dragger has a draggable with this point_type.
+ */
+bool GrDragger::isA(GrPointType point_type)
+{
+ for (auto draggable : this->draggables) {
+ if (draggable->point_type == point_type) {
+ return true;
+ }
+ }
+ return false;
+}
+
+/**
+ * Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke.
+ */
+bool GrDragger::isA(SPItem *item, GrPointType point_type, gint point_i, Inkscape::PaintTarget fill_or_stroke)
+{
+ for (auto draggable : this->draggables) {
+ if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
+ return true;
+ }
+ }
+ return false;
+}
+
+/**
+ * Checks if the dragger has a draggable with this item, point_type, fill_or_stroke.
+ */
+bool GrDragger::isA(SPItem *item, GrPointType point_type, Inkscape::PaintTarget fill_or_stroke)
+{
+ for (auto draggable : this->draggables) {
+ if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
+ return true;
+ }
+ }
+ return false;
+}
+
+bool GrDraggable::mayMerge(GrDraggable *da2)
+{
+ if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
+ // we must not merge the points of the same gradient!
+ if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
+ (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
+ // except that we can snap center and focus together
+ return false;
+ }
+ }
+ // disable merging of midpoints.
+ if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
+ || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
+ || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
+ return false;
+
+ return true;
+}
+
+bool GrDragger::mayMerge(GrDragger *other)
+{
+ if (this == other)
+ return false;
+
+ for (auto da1 : this->draggables) {
+ for (auto da2 : other->draggables) {
+ if (!da1->mayMerge(da2))
+ return false;
+ }
+ }
+ return true;
+}
+
+bool GrDragger::mayMerge(GrDraggable *da2)
+{
+ for (auto da1 : this->draggables) {
+ if (!da1->mayMerge(da2))
+ return false;
+ }
+ return true;
+}
+
+/**
+ * Update mesh handles when mesh corner is moved.
+ * pc_old: old position of corner (could be changed to dp if we figure out transforms).
+ * op: how other nodes (handles, tensors) should be moved.
+ * Scaling takes place only between a selected and an unselected corner,
+ * other wise a handle is displaced the same distance as the adjacent corner.
+ * If a side is a line, then the handles are always placed 1/3 of side length
+ * from each corner.
+ *
+ * Ooops, needs to be reimplemented.
+ */
+void
+GrDragger::moveMeshHandles ( Geom::Point pc_old, MeshNodeOperation op )
+{
+ // This routine might more properly be in mesh-context.cpp but moving knots is
+ // handled here rather than there.
+
+ // We need to update two places:
+ // 1. In SPMeshArrayI with object coordinates
+ // 2. In Drager/Knots with desktop coordinates.
+
+ // This routine is more complicated than it might need to be inorder to allow
+ // corner points to be selected in multiple meshes at the same time... with some
+ // sharing the same dragger (overkill, perhaps?).
+
+ // If no corner point in GrDragger then do nothing.
+ if( !isA (POINT_MG_CORNER ) ) return;
+
+ GrDrag *drag = this->parent;
+
+ // We need a list of selected corners per mesh if scaling.
+ std::map<SPGradient*, std::vector<guint> > selected_corners;
+ // scaling was disabled so #if 0'ing out for now.
+#if 0
+ const bool scale = false;
+ if( scale ) {
+
+ for( std::set<GrDragger *>::const_iterator it = drag->selected.begin(); it != drag->selected.end(); ++it ) {
+ GrDragger *dragger = *it;
+ for (std::vector<GrDraggable *>::const_iterator it2 = dragger->draggables.begin(); it2 != dragger->draggables.end(); ++it2 ) {
+ GrDraggable *draggable = *it2;
+
+ // Check draggable is of type POINT_MG_CORNER (don't allow selection of POINT_MG_HANDLE)
+ if( draggable->point_type != POINT_MG_CORNER ) continue;
+
+ // Must be a mesh gradient
+ SPGradient *gradient = getGradient(draggable->item, draggable->fill_or_stroke);
+ if ( !SP_IS_MESHGRADIENT( gradient ) ) continue;
+
+ selected_corners[ gradient ].push_back( draggable->point_i );
+ }
+ }
+ }
+#endif
+
+ // Now we do the handle moves.
+
+ // Loop over all draggables in moved corner
+ std::map<SPGradient*, std::vector<guint> > dragger_corners;
+ for (auto draggable : draggables) {
+ SPItem *item = draggable->item;
+ gint point_type = draggable->point_type;
+ gint point_i = draggable->point_i;
+ Inkscape::PaintTarget
+ fill_or_stroke = draggable->fill_or_stroke;
+
+ // Check draggable is of type POINT_MG_CORNER (don't allow selection of POINT_MG_HANDLE)
+ if( point_type != POINT_MG_CORNER ) continue;
+
+ // Must be a mesh gradient
+ SPGradient *gradient = getGradient(item, fill_or_stroke);
+ if ( !SP_IS_MESHGRADIENT( gradient ) ) continue;
+ SPMeshGradient *mg = SP_MESHGRADIENT( gradient );
+
+ // pc_old is the old corner position in desktop coordinates, we need it in gradient coordinate.
+ gradient = sp_gradient_convert_to_userspace (gradient, item, (fill_or_stroke == Inkscape::FOR_FILL) ? "fill" : "stroke");
+ Geom::Affine i2d ( item->i2dt_affine() );
+ Geom::Point pcg_old = pc_old * i2d.inverse();
+ pcg_old *= (gradient->gradientTransform).inverse();
+
+ mg->array.update_handles( point_i, selected_corners[ gradient ], pcg_old, op );
+ mg->array.write( mg );
+
+ // Move on-screen knots
+ for( guint i = 0; i < mg->array.handles.size(); ++i ) {
+ GrDragger *handle = drag->getDraggerFor( item, POINT_MG_HANDLE, i, fill_or_stroke );
+ SPKnot *knot = handle->knot;
+ Geom::Point pk = getGradientCoords( item, POINT_MG_HANDLE, i, fill_or_stroke );
+ knot->moveto(pk);
+
+ }
+
+ for( guint i = 0; i < mg->array.tensors.size(); ++i ) {
+
+ GrDragger *handle = drag->getDraggerFor( item, POINT_MG_TENSOR, i, fill_or_stroke );
+ SPKnot *knot = handle->knot;
+ Geom::Point pk = getGradientCoords( item, POINT_MG_TENSOR, i, fill_or_stroke );
+ knot->moveto(pk);
+
+ }
+
+ } // Loop over draggables.
+}
+
+
+/**
+ * Updates the statusbar tip of the dragger knot, based on its draggables.
+ */
+void GrDragger::updateTip()
+{
+ g_return_if_fail(this->knot != nullptr);
+
+ if (this->knot && this->knot->tip) {
+ g_free (this->knot->tip);
+ this->knot->tip = nullptr;
+ }
+
+ if (this->draggables.size() == 1) {
+ GrDraggable *draggable = this->draggables[0];
+ char *item_desc = draggable->item->detailedDescription();
+ switch (draggable->point_type) {
+ case POINT_LG_MID:
+ case POINT_RG_MID1:
+ case POINT_RG_MID2:
+ this->knot->tip = g_strdup_printf (_("%s %d for: %s%s; drag with <b>Ctrl</b> to snap offset; click with <b>Ctrl+Alt</b> to delete stop"),
+ _(gr_knot_descr[draggable->point_type]),
+ draggable->point_i,
+ item_desc,
+ (draggable->fill_or_stroke == Inkscape::FOR_STROKE) ? _(" (stroke)") : "");
+ break;
+
+ case POINT_MG_CORNER:
+ case POINT_MG_HANDLE:
+ case POINT_MG_TENSOR:
+ this->knot->tip = g_strdup_printf (_("%s for: %s%s"),
+ _(gr_knot_descr[draggable->point_type]),
+ item_desc,
+ (draggable->fill_or_stroke == Inkscape::FOR_STROKE) ? _(" (stroke)") : "");
+ break;
+
+ default:
+ this->knot->tip = g_strdup_printf (_("%s for: %s%s; drag with <b>Ctrl</b> to snap angle, with <b>Ctrl+Alt</b> to preserve angle, with <b>Ctrl+Shift</b> to scale around center"),
+ _(gr_knot_descr[draggable->point_type]),
+ item_desc,
+ (draggable->fill_or_stroke == Inkscape::FOR_STROKE) ? _(" (stroke)") : "");
+ break;
+ }
+ g_free(item_desc);
+ } else if (draggables.size() == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
+ this->knot->tip = g_strdup_printf ("%s", _("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
+ } else {
+ int length = this->draggables.size();
+ this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
+ "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
+ length),
+ length);
+ }
+}
+
+/**
+ * Adds a draggable to the dragger.
+ */
+void GrDragger::updateKnotShape()
+{
+ if (draggables.empty())
+ return;
+ GrDraggable *last = draggables.back();
+
+ this->knot->ctrl->set_shape(gr_knot_shapes[last->point_type]);
+
+ // For highlighting mesh handles corresponding to selected corner
+ if (this->knot->shape == Inkscape::CANVAS_ITEM_CTRL_SHAPE_TRIANGLE) {
+ this->knot->setFill(GR_KNOT_COLOR_HIGHLIGHT, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
+ if (gr_knot_shapes[last->point_type] == Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE) {
+ this->knot->ctrl->set_shape(Inkscape::CANVAS_ITEM_CTRL_SHAPE_TRIANGLE);
+ }
+ }
+}
+
+/**
+ * Adds a draggable to the dragger.
+ */
+void GrDragger::addDraggable(GrDraggable *draggable)
+{
+ this->draggables.insert(this->draggables.begin(), draggable);
+
+ this->updateTip();
+}
+
+
+/**
+ * Moves this dragger to the point of the given draggable, acting upon all other draggables.
+ */
+void GrDragger::moveThisToDraggable(SPItem *item, GrPointType point_type, gint point_i, Inkscape::PaintTarget fill_or_stroke, bool write_repr)
+{
+ if (draggables.empty())
+ return;
+
+ GrDraggable *dr_first = draggables[0];
+
+ this->point = getGradientCoords(dr_first->item, dr_first->point_type, dr_first->point_i, dr_first->fill_or_stroke);
+ this->point_original = this->point;
+
+ this->knot->moveto(this->point);
+
+ for (auto da : draggables) {
+ if ( (da->item == item) &&
+ (da->point_type == point_type) &&
+ (point_i == -1 || da->point_i == point_i) &&
+ (da->fill_or_stroke == fill_or_stroke) ) {
+ // Don't move initial draggable
+ continue;
+ }
+ sp_item_gradient_set_coords(da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
+ }
+ // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
+}
+
+
+/**
+ * Moves all midstop draggables that depend on this one.
+ */
+void GrDragger::updateMidstopDependencies(GrDraggable *draggable, bool write_repr)
+{
+ SPObject *server = draggable->getServer();
+ if (!server)
+ return;
+ guint num = SP_GRADIENT(server)->vector.stops.size();
+ if (num <= 2) return;
+
+ if ( SP_IS_LINEARGRADIENT(server) ) {
+ for ( guint i = 1; i < num - 1; i++ ) {
+ this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
+ }
+ } else if ( SP_IS_RADIALGRADIENT(server) ) {
+ for ( guint i = 1; i < num - 1; i++ ) {
+ this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
+ this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
+ }
+ }
+}
+
+
+/**
+ * Moves all draggables that depend on this one.
+ */
+void GrDragger::updateDependencies(bool write_repr)
+{
+ for (auto draggable : draggables) {
+ switch (draggable->point_type) {
+ case POINT_LG_BEGIN:
+ {
+ // the end point is dependent only when dragging with ctrl+shift
+ this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
+
+ this->updateMidstopDependencies (draggable, write_repr);
+ }
+ break;
+ case POINT_LG_END:
+ {
+ // the begin point is dependent only when dragging with ctrl+shift
+ this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
+
+ this->updateMidstopDependencies (draggable, write_repr);
+ }
+ break;
+ case POINT_LG_MID:
+ // no other nodes depend on mid points.
+ break;
+ case POINT_RG_R2:
+ this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
+ this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
+ this->updateMidstopDependencies (draggable, write_repr);
+ break;
+ case POINT_RG_R1:
+ this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
+ this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
+ this->updateMidstopDependencies (draggable, write_repr);
+ break;
+ case POINT_RG_CENTER:
+ this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
+ this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
+ this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
+ this->updateMidstopDependencies (draggable, write_repr);
+ break;
+ case POINT_RG_FOCUS:
+ // nothing can depend on that
+ break;
+ case POINT_RG_MID1:
+ this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
+ break;
+ case POINT_RG_MID2:
+ this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+
+
+GrDragger::GrDragger(GrDrag *parent, Geom::Point p, GrDraggable *draggable)
+ : point(p),
+ point_original(p)
+{
+ this->draggables.clear();
+
+ this->parent = parent;
+
+ guint32 fill_color = GR_KNOT_COLOR_NORMAL;
+ if (draggable && draggable->point_type == POINT_MG_CORNER) {
+ fill_color = GR_KNOT_COLOR_MESHCORNER;
+ }
+
+ // create the knot
+ this->knot = new SPKnot(parent->desktop, "", Inkscape::CANVAS_ITEM_CTRL_TYPE_SHAPER, "CanvasItemCtrl::GrDragger");
+ this->knot->setFill(fill_color, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
+ this->knot->setStroke(0x0000007f, 0x0000007f, 0x0000007f, 0x0000007f);
+ this->updateControlSizesOverload(this->knot);
+ this->knot->updateCtrl();
+
+ // move knot to the given point
+ this->knot->setPosition(p, SP_KNOT_STATE_NORMAL);
+ this->knot->show();
+
+ // connect knot's signals
+ if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
+ // luckily, midstops never snap to other nodes so are never unsnapped...
+ && ( (draggable->point_type == POINT_LG_MID)
+ || (draggable->point_type == POINT_RG_MID1)
+ || (draggable->point_type == POINT_RG_MID2) ) )
+ {
+ this->_moved_connection = this->knot->moved_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_moved_midpoint_handler), this));
+ } else {
+ this->_moved_connection = this->knot->moved_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_moved_handler), this));
+ }
+
+ this->_clicked_connection =
+ this->knot->click_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_clicked_handler), this));
+
+ this->_doubleclicked_connection =
+ this->knot->doubleclicked_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_doubleclicked_handler), this));
+
+ this->_mousedown_connection =
+ this->knot->mousedown_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_mousedown_handler), this));
+
+ this->_ungrabbed_connection =
+ this->knot->ungrabbed_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_ungrabbed_handler), this));
+
+ // add the initial draggable
+ if (draggable) {
+ this->addDraggable (draggable);
+ }
+
+ updateKnotShape();
+}
+
+GrDragger::~GrDragger()
+{
+ // unselect if it was selected
+ // Hmm, this causes a race condition as it triggers a call to gradient_selection_changed which
+ // can be executed while a list of draggers is being deleted. It doesn't actually seem to be
+ // necessary.
+ //this->parent->setDeselected(this);
+
+ // disconnect signals
+ this->_moved_connection.disconnect();
+ this->_clicked_connection.disconnect();
+ this->_doubleclicked_connection.disconnect();
+ this->_mousedown_connection.disconnect();
+ this->_ungrabbed_connection.disconnect();
+
+ /* unref should call destroy */
+ knot_unref(this->knot);
+
+ // delete all draggables
+ for (auto draggable : this->draggables) {
+ delete draggable;
+ }
+ this->draggables.clear();
+}
+
+/**
+ * Select the dragger which has the given draggable.
+ */
+GrDragger *GrDrag::getDraggerFor(GrDraggable *d) {
+ for (auto dragger : this->draggers) {
+ for (std::vector<GrDraggable *>::const_iterator j = dragger->draggables.begin(); j != dragger->draggables.end(); ++j ) {
+ if (d == *j) {
+ return dragger;
+ }
+ }
+ }
+ return nullptr;
+}
+
+/**
+ * Select the dragger which has the given draggable.
+ */
+GrDragger *GrDrag::getDraggerFor(SPItem *item, GrPointType point_type, gint point_i, Inkscape::PaintTarget fill_or_stroke)
+{
+ for (auto dragger : this->draggers) {
+ for (std::vector<GrDraggable *>::const_iterator j = dragger->draggables.begin(); j != dragger->draggables.end(); ++j ) {
+ GrDraggable *da2 = *j;
+ if ( (da2->item == item) &&
+ (da2->point_type == point_type) &&
+ (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
+ (da2->fill_or_stroke == fill_or_stroke)) {
+ return (dragger);
+ }
+ }
+ }
+ return nullptr;
+}
+
+
+void GrDragger::moveOtherToDraggable(SPItem *item, GrPointType point_type, gint point_i, Inkscape::PaintTarget fill_or_stroke, bool write_repr)
+{
+ GrDragger *d = this->parent->getDraggerFor(item, point_type, point_i, fill_or_stroke);
+ if (d && d != this) {
+ d->moveThisToDraggable(item, point_type, point_i, fill_or_stroke, write_repr);
+ }
+}
+
+/**
+ * Find mesh corner corresponding to given dragger.
+ */
+GrDragger* GrDragger::getMgCorner(){
+ GrDraggable *draggable = (GrDraggable *) this->draggables[0];
+ if (draggable) {
+
+ // If corner, we already found it!
+ if (draggable->point_type == POINT_MG_CORNER) {
+ return this;
+ }
+
+ // The mapping between handles and corners is complex... so find corner by bruit force.
+ SPGradient *gradient = getGradient(draggable->item, draggable->fill_or_stroke);
+ SPMeshGradient *mg = dynamic_cast<SPMeshGradient *>(gradient);
+ if (mg) {
+ std::vector< std::vector< SPMeshNode* > > nodes = mg->array.nodes;
+ for (guint i = 0; i < nodes.size(); ++i) {
+ for (guint j = 0; j < nodes[i].size(); ++j) {
+ if (nodes[i][j]->set && nodes[i][j]->node_type == MG_NODE_TYPE_HANDLE) {
+ if (draggable->point_i == (gint)nodes[i][j]->draggable) {
+
+ if (nodes.size() > i+1 && nodes[i+1].size() > j && nodes[i+1][j]->node_type == MG_NODE_TYPE_CORNER) {
+ return this->parent->getDraggerFor(draggable->item, POINT_MG_CORNER, nodes[i+1][j]->draggable, draggable->fill_or_stroke);
+ }
+
+ if (j != 0 && nodes.size() > i && nodes[i].size() > j-1 && nodes[i][j-1]->node_type == MG_NODE_TYPE_CORNER) {
+ return this->parent->getDraggerFor(draggable->item, POINT_MG_CORNER, nodes[i][j-1]->draggable, draggable->fill_or_stroke);
+ }
+
+ if (i != 0 && nodes.size() > i-1 && nodes[i-1].size() > j && nodes[i-1][j]->node_type == MG_NODE_TYPE_CORNER) {
+ return this->parent->getDraggerFor(draggable->item, POINT_MG_CORNER, nodes[i-1][j]->draggable, draggable->fill_or_stroke);
+ }
+
+ if (nodes.size() > i && nodes[i].size() > j+1 && nodes[i][j+1]->node_type == MG_NODE_TYPE_CORNER) {
+ return this->parent->getDraggerFor(draggable->item, POINT_MG_CORNER, nodes[i][j+1]->draggable, draggable->fill_or_stroke);
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ return nullptr;
+}
+
+/**
+ * Highlight mesh node
+ */
+void GrDragger::highlightNode(SPMeshNode *node, bool highlight, Geom::Point corner_pos, int index)
+{
+ GrPointType type = POINT_MG_TENSOR;
+ if (node->node_type == MG_NODE_TYPE_HANDLE) {
+ type = POINT_MG_HANDLE;
+ }
+
+ GrDraggable *draggable = (GrDraggable *) this->draggables[0];
+ GrDragger *d = this->parent->getDraggerFor(draggable->item, type, node->draggable, draggable->fill_or_stroke);
+ if (d && node->draggable < G_MAXUINT) {
+ Geom::Point end = d->knot->pos;
+ Geom::Ray ray = Geom::Ray(corner_pos, end);
+ if (d->knot->desktop->is_yaxisdown()) {
+ end *= Geom::Scale(1, -1);
+ corner_pos *= Geom::Scale(1, -1);
+ ray.setPoints(corner_pos, end);
+ }
+ double angl = ray.angle();
+
+ if (highlight && knot->fill[SP_KNOT_VISIBLE] == GR_KNOT_COLOR_HIGHLIGHT && abs(angl - knot->angle) > Geom::rad_from_deg(10.0)){
+ return;
+ }
+
+ SPKnot *knot = d->knot;
+ if (highlight) {
+ knot->setFill(GR_KNOT_COLOR_HIGHLIGHT, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
+ } else {
+ knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
+ }
+
+ if (type == POINT_MG_HANDLE) {
+ if (highlight) {
+ knot->setShape(Inkscape::CANVAS_ITEM_CTRL_SHAPE_TRIANGLE);
+ } else {
+ knot->setShape(Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE);
+ }
+ } else {
+ //Code for tensors
+ return;
+ }
+
+ this->updateControlSizesOverload(knot);
+ knot->setAngle(angl);
+ knot->updateCtrl();
+ d->updateKnotShape();
+ }
+}
+
+/**
+ * Highlight handles for mesh corner corresponding to this dragger.
+ */
+void GrDragger::highlightCorner(bool highlight)
+{
+ // Must be a mesh gradient
+ GrDraggable *draggable = (GrDraggable *) this->draggables[0];
+ if (draggable && draggable->point_type == POINT_MG_CORNER) {
+ SPGradient *gradient = getGradient(draggable->item, draggable->fill_or_stroke);
+ if (SP_IS_MESHGRADIENT( gradient )) {
+ Geom::Point corner_point = this->point;
+ gint corner = draggable->point_i;
+ SPMeshGradient *mg = SP_MESHGRADIENT( gradient );
+ SPMeshNodeArray mg_arr = mg->array;
+ std::vector< std::vector< SPMeshNode* > > nodes = mg_arr.nodes;
+ // Find number of patch rows and columns
+ guint mrow = mg_arr.patch_rows();
+ guint mcol = mg_arr.patch_columns();
+ // Number of corners in a row of patches.
+ guint ncorners = mcol + 1;
+ // Find corner row/column
+ guint crow = corner / ncorners;
+ guint ccol = corner % ncorners;
+ // Find node row/column
+ guint nrow = crow * 3;
+ guint ncol = ccol * 3;
+
+ bool patch[4];
+ patch[0] = patch[1] = patch[2] = patch[3] = false;
+ if (ccol > 0 && crow > 0 ) patch[0] = true;
+ if (ccol < mcol && crow > 0 ) patch[1] = true;
+ if (ccol < mcol && crow < mrow ) patch[2] = true;
+ if (ccol > 0 && crow < mrow ) patch[3] = true;
+ if (patch[0] || patch[1]) {
+ highlightNode(nodes[nrow - 1][ncol], highlight, corner_point, 0);
+ }
+ if (patch[1] || patch[2]) {
+ highlightNode(nodes[nrow][ncol + 1], highlight, corner_point, 1);
+ }
+ if (patch[2] || patch[3]) {
+ highlightNode(nodes[nrow + 1][ncol], highlight, corner_point, 2);
+ }
+ if (patch[3] || patch[0]) {
+ highlightNode(nodes[nrow][ncol - 1], highlight, corner_point, 3);
+ }
+ // Highlight tensors
+ /*
+ if( patch[0] ) highlightNode(nodes[nrow-1][ncol-1], highlight, corner_point, point_i);
+ if( patch[1] ) highlightNode(nodes[nrow-1][ncol+1], highlight, corner_point, point_i);
+ if( patch[2] ) highlightNode(nodes[nrow+1][ncol+1], highlight, corner_point, point_i);
+ if( patch[3] ) highlightNode(nodes[nrow+1][ncol-1], highlight, corner_point, point_i);
+ */
+ }
+ }
+}
+
+/**
+ * Draw this dragger as selected.
+ */
+void GrDragger::select()
+{
+ this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
+ this->knot->ctrl->set_fill(GR_KNOT_COLOR_SELECTED);
+ highlightCorner(true);
+}
+
+/**
+ * Draw this dragger as normal (deselected).
+ */
+void GrDragger::deselect()
+{
+ guint32 fill_color = isA(POINT_MG_CORNER) ? GR_KNOT_COLOR_MESHCORNER : GR_KNOT_COLOR_NORMAL;
+ this->knot->fill [SP_KNOT_STATE_NORMAL] = fill_color;
+ this->knot->ctrl->set_fill(fill_color);
+ highlightCorner(false);
+}
+
+bool
+GrDragger::isSelected()
+{
+ return parent->selected.find(this) != parent->selected.end();
+}
+
+/**
+ * Deselect all stops/draggers (private).
+ */
+void GrDrag::deselect_all()
+{
+ for (auto it : selected)
+ it->deselect();
+ selected.clear();
+}
+
+/**
+ * Deselect all stops/draggers (public; emits signal).
+ */
+void GrDrag::deselectAll()
+{
+ deselect_all();
+ desktop->emit_gradient_stop_selected(this, nullptr);
+}
+
+/**
+ * Select all stops/draggers.
+ */
+void GrDrag::selectAll()
+{
+ for (auto d : this->draggers) {
+ setSelected (d, true, true);
+ }
+}
+
+/**
+ * Select all stops/draggers that match the coords.
+ */
+void GrDrag::selectByCoords(std::vector<Geom::Point> coords)
+{
+ for (auto d : this->draggers) {
+ for (auto coord : coords) {
+ if (Geom::L2 (d->point - coord) < 1e-4) {
+ setSelected (d, true, true);
+ }
+ }
+ }
+}
+
+/**
+ * Select draggers by stop
+ */
+void GrDrag::selectByStop(SPStop *stop, bool add_to_selection, bool override )
+{
+ for (auto dragger : this->draggers) {
+
+ for (std::vector<GrDraggable *>::const_iterator j = dragger->draggables.begin(); j != dragger->draggables.end(); ++j) {
+
+ GrDraggable *d = *j;
+ SPGradient *gradient = getGradient(d->item, d->fill_or_stroke);
+ SPGradient *vector = gradient->getVector(false);
+ SPStop *stop_i = sp_get_stop_i(vector, d->point_i);
+
+ if (stop_i == stop) {
+ setSelected(dragger, add_to_selection, override);
+ }
+ }
+ }
+}
+/**
+ * Select all stops/draggers that fall within the rect.
+ */
+void GrDrag::selectRect(Geom::Rect const &r)
+{
+ for (auto d : this->draggers) {
+ if (r.contains(d->point)) {
+ setSelected (d, true, true);
+ }
+ }
+}
+
+/**
+ * Select a dragger.
+ * @param dragger The dragger to select.
+ * @param add_to_selection If true, add to selection, otherwise deselect others.
+ * @param override If true, always select this node, otherwise toggle selected status.
+*/
+void GrDrag::setSelected(GrDragger *dragger, bool add_to_selection, bool override)
+{
+ GrDragger *seldragger = nullptr;
+
+ // Don't allow selecting a mesh handle or mesh tensor.
+ // We might want to rethink since a dragger can have draggables of different types.
+ if ( dragger->isA( POINT_MG_HANDLE ) || dragger->isA( POINT_MG_TENSOR ) ) return;
+
+ if (add_to_selection) {
+ if (!dragger) return;
+ if (override) {
+ selected.insert(dragger);
+ dragger->select();
+ seldragger = dragger;
+ } else { // toggle
+ if(selected.find(dragger)!=selected.end()) {
+ selected.erase(dragger);
+ dragger->deselect();
+ if (!selected.empty()) {
+ seldragger = *(selected.begin()); // select the dragger that is first in the list
+ }
+ } else {
+ selected.insert(dragger);
+ dragger->select();
+ seldragger = dragger;
+ }
+ }
+ } else {
+ deselect_all();
+ if (dragger) {
+ selected.insert(dragger);
+ dragger->select();
+ seldragger = dragger;
+ }
+ }
+ if (seldragger) {
+ desktop->emit_gradient_stop_selected(this, nullptr);
+ }
+}
+
+/**
+ * Deselect a dragger.
+ * @param dragger The dragger to deselect.
+ */
+void GrDrag::setDeselected(GrDragger *dragger)
+{
+ if (selected.find(dragger) != selected.end()) {
+ selected.erase(dragger);
+ dragger->deselect();
+ }
+ desktop->emit_gradient_stop_selected(this, nullptr);
+}
+
+
+/**
+ * Create a line from p1 to p2 and add it to the curves list. Used for linear and radial gradients.
+ */
+void GrDrag::addLine(SPItem *item, Geom::Point p1, Geom::Point p2, Inkscape::PaintTarget fill_or_stroke)
+{
+ auto canvas_item_color = (fill_or_stroke == Inkscape::FOR_FILL) ? Inkscape::CANVAS_ITEM_PRIMARY : Inkscape::CANVAS_ITEM_SECONDARY;
+ auto item_curve = new Inkscape::CanvasItemCurve(desktop->getCanvasControls(), p1, p2);
+ item_curve->set_name("GradientLine");
+ item_curve->set_stroke(canvas_item_color);
+ item_curve->set_is_fill(fill_or_stroke == Inkscape::FOR_FILL);
+ item_curve->set_item(item);
+ item_curves.push_back(item_curve);
+}
+
+
+
+/**
+ * Create a curve from p0 to p3 and add it to the curves list. Used for mesh sides.
+ */
+void GrDrag::addCurve(SPItem *item, Geom::Point p0, Geom::Point p1, Geom::Point p2, Geom::Point p3,
+ int corner0, int corner1, int handle0, int handle1, Inkscape::PaintTarget fill_or_stroke)
+
+{
+ // Highlight curve if one of its draggers has a mouse over it.
+ bool highlight = false;
+ GrDragger* dragger0 = getDraggerFor(item, POINT_MG_CORNER, corner0, fill_or_stroke);
+ GrDragger* dragger1 = getDraggerFor(item, POINT_MG_CORNER, corner1, fill_or_stroke);
+ GrDragger* dragger2 = getDraggerFor(item, POINT_MG_HANDLE, handle0, fill_or_stroke);
+ GrDragger* dragger3 = getDraggerFor(item, POINT_MG_HANDLE, handle1, fill_or_stroke);
+ if ((dragger0->knot && (dragger0->knot->flags & SP_KNOT_MOUSEOVER)) ||
+ (dragger1->knot && (dragger1->knot->flags & SP_KNOT_MOUSEOVER)) ||
+ (dragger2->knot && (dragger2->knot->flags & SP_KNOT_MOUSEOVER)) ||
+ (dragger3->knot && (dragger3->knot->flags & SP_KNOT_MOUSEOVER)) ) {
+ highlight = true;
+ }
+
+ auto canvas_item_color =
+ (fill_or_stroke == Inkscape::FOR_FILL) ? Inkscape::CANVAS_ITEM_PRIMARY : Inkscape::CANVAS_ITEM_SECONDARY;
+ if (highlight) {
+ canvas_item_color =
+ (fill_or_stroke == Inkscape::FOR_FILL) ? Inkscape::CANVAS_ITEM_SECONDARY : Inkscape::CANVAS_ITEM_PRIMARY;
+ }
+
+ auto item_curve = new Inkscape::CanvasItemCurve(desktop->getCanvasControls(), p0, p1, p2, p3);
+ item_curve->set_name("GradientCurve");
+ item_curve->set_stroke(canvas_item_color);
+ item_curve->set_is_fill(fill_or_stroke == Inkscape::FOR_FILL);
+ item_curve->set_item(item);
+ item_curve->set_corner0(corner0);
+ item_curve->set_corner1(corner1);
+ item_curves.push_back(item_curve);
+}
+
+
+/**
+ * If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create
+ * new dragger and add it to draggers list.
+ */
+GrDragger* GrDrag::addDragger(GrDraggable *draggable)
+{
+ Geom::Point p = getGradientCoords(draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
+
+ for (auto dragger : this->draggers) {
+ if (dragger->mayMerge (draggable) && Geom::L2 (dragger->point - p) < MERGE_DIST) {
+ // distance is small, merge this draggable into dragger, no need to create new dragger
+ dragger->addDraggable (draggable);
+ dragger->updateKnotShape();
+ return dragger;
+ }
+ }
+
+ GrDragger *new_dragger = new GrDragger(this, p, draggable);
+ // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end.
+ this->draggers.push_back(new_dragger);
+ return new_dragger;
+}
+
+/**
+ * Add draggers for the radial gradient rg on item.
+ */
+void GrDrag::addDraggersRadial(SPRadialGradient *rg, SPItem *item, Inkscape::PaintTarget fill_or_stroke)
+{
+ rg->ensureVector();
+ addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke));
+ guint num = rg->vector.stops.size();
+ if (num > 2) {
+ for ( guint i = 1; i < num - 1; i++ ) {
+ addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke));
+ }
+ }
+ addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke));
+ if (num > 2) {
+ for ( guint i = 1; i < num - 1; i++ ) {
+ addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke));
+ }
+ }
+ addDragger (new GrDraggable (item, POINT_RG_R2, num - 1, fill_or_stroke));
+ addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke));
+}
+
+/**
+ * Add draggers for the linear gradient lg on item.
+ */
+void GrDrag::addDraggersLinear(SPLinearGradient *lg, SPItem *item, Inkscape::PaintTarget fill_or_stroke)
+{
+ lg->ensureVector();
+ addDragger(new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke));
+ guint num = lg->vector.stops.size();
+ if (num > 2) {
+ for ( guint i = 1; i < num - 1; i++ ) {
+ addDragger(new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke));
+ }
+ }
+ addDragger(new GrDraggable (item, POINT_LG_END, num - 1, fill_or_stroke));
+}
+
+/**
+ *Add draggers for the mesh gradient mg on item
+ */
+void GrDrag::addDraggersMesh(SPMeshGradient *mg, SPItem *item, Inkscape::PaintTarget fill_or_stroke)
+{
+ mg->ensureArray();
+ std::vector< std::vector< SPMeshNode* > > nodes = mg->array.nodes;
+
+ // Show/hide mesh on fill/stroke. This doesn't work at the moment... and prevents node color updating.
+
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ bool show_handles = (prefs->getBool("/tools/mesh/show_handles", true));
+ bool edit_fill = (prefs->getBool("/tools/mesh/edit_fill", true));
+ bool edit_stroke = (prefs->getBool("/tools/mesh/edit_stroke", true));
+
+ // Make sure we have at least one patch defined.
+ if( mg->array.patch_rows() == 0 || mg->array.patch_columns() == 0 ) {
+
+ std::cerr << "Empty Mesh, No Draggers to Add" << std::endl;
+ return;
+ }
+
+ guint icorner = 0;
+ guint ihandle = 0;
+ guint itensor = 0;
+ mg->array.corners.clear();
+ mg->array.handles.clear();
+ mg->array.tensors.clear();
+
+ if( (fill_or_stroke == Inkscape::FOR_FILL && !edit_fill) ||
+ (fill_or_stroke == Inkscape::FOR_STROKE && !edit_stroke) ) {
+ return;
+ }
+
+ for(auto & node : nodes) {
+ for(auto & j : node) {
+
+ // std::cout << " Draggers: " << i << " " << j << " " << nodes[i][j]->node_type << std::endl;
+ switch ( j->node_type ) {
+
+ case MG_NODE_TYPE_CORNER:
+ {
+ mg->array.corners.push_back( j );
+ GrDraggable *corner = new GrDraggable (item, POINT_MG_CORNER, icorner, fill_or_stroke);
+ addDragger ( corner );
+ j->draggable = icorner;
+ ++icorner;
+ break;
+ }
+
+ case MG_NODE_TYPE_HANDLE:
+ {
+ mg->array.handles.push_back( j );
+ GrDraggable *handle = new GrDraggable (item, POINT_MG_HANDLE, ihandle, fill_or_stroke);
+ GrDragger* dragger = addDragger ( handle );
+
+ if( !show_handles || !j->set ) {
+ dragger->knot->hide();
+ }
+ j->draggable = ihandle;
+ ++ihandle;
+ break;
+ }
+
+ case MG_NODE_TYPE_TENSOR:
+ {
+ mg->array.tensors.push_back( j );
+ GrDraggable *tensor = new GrDraggable (item, POINT_MG_TENSOR, itensor, fill_or_stroke);
+ GrDragger* dragger = addDragger ( tensor );
+ if( !show_handles || !j->set ) {
+ dragger->knot->hide();
+ }
+ j->draggable = itensor;
+ ++itensor;
+ break;
+ }
+
+ default:
+ std::cerr << "Bad Mesh draggable type" << std::endl;
+ break;
+ }
+ }
+ }
+
+ mg->array.draggers_valid = true;
+}
+
+/**
+ * Refresh draggers, moving and toggling visibility as necessary.
+ * Does not regenerate draggers (as does updateDraggersMesh()).
+ */
+void GrDrag::refreshDraggersMesh(SPMeshGradient *mg, SPItem *item, Inkscape::PaintTarget fill_or_stroke)
+{
+ mg->ensureArray();
+ std::vector< std::vector< SPMeshNode* > > nodes = mg->array.nodes;
+
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ bool show_handles = (prefs->getBool("/tools/mesh/show_handles", true));
+
+ // Make sure we have at least one patch defined.
+ if( mg->array.patch_rows() == 0 || mg->array.patch_columns() == 0 ) {
+
+ std::cerr << "GrDrag::refreshDraggersMesh: Empty Mesh, No Draggers to refresh!" << std::endl;
+ return;
+ }
+
+ guint ihandle = 0;
+ guint itensor = 0;
+
+ for(auto & node : nodes) {
+ for(auto & j : node) {
+
+ // std::cout << " Draggers: " << i << " " << j << " " << nodes[i][j]->node_type << std::endl;
+
+ switch ( j->node_type ) {
+
+ case MG_NODE_TYPE_CORNER:
+ // Do nothing, corners are always shown.
+ break;
+
+ case MG_NODE_TYPE_HANDLE:
+ {
+ GrDragger* dragger = getDraggerFor(item, POINT_MG_HANDLE, ihandle, fill_or_stroke);
+ if (dragger) {
+ Geom::Point pk = getGradientCoords( item, POINT_MG_HANDLE, ihandle, fill_or_stroke);
+ dragger->knot->moveto(pk);
+ if( !show_handles || !j->set ) {
+ dragger->knot->hide();
+ } else {
+ dragger->knot->show();
+ }
+ } else {
+ // This can happen if a draggable is not visible.
+ // std::cerr << "GrDrag::refreshDraggersMesh: No dragger!" << std::endl;
+ }
+ ++ihandle;
+ break;
+ }
+
+ case MG_NODE_TYPE_TENSOR:
+ {
+ GrDragger* dragger = getDraggerFor(item, POINT_MG_TENSOR, itensor, fill_or_stroke);
+ if (dragger) {
+ Geom::Point pk = getGradientCoords( item, POINT_MG_TENSOR, itensor, fill_or_stroke);
+ dragger->knot->moveto(pk);
+ if( !show_handles || !j->set ) {
+ dragger->knot->hide();
+ } else {
+ dragger->knot->show();
+ }
+ } else {
+ // This can happen if a draggable is not visible.
+ // std::cerr << "GrDrag::refreshDraggersMesh: No dragger!" << std::endl;
+ }
+ ++itensor;
+ break;
+ }
+
+ default:
+ std::cerr << "Bad Mesh draggable type" << std::endl;
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * Artificially grab the knot of this dragger; used by the gradient context.
+ * Not used at the moment.
+ */
+void GrDrag::grabKnot(GrDragger *dragger, gint x, gint y, guint32 etime)
+{
+ if (dragger) {
+ dragger->knot->startDragging(dragger->point, x, y, etime);
+ }
+}
+
+/**
+ * Artificially grab the knot of the dragger with this draggable; used by the gradient context.
+ * This allows setting the final point from the end of the drag when creating a new gradient.
+ */
+void GrDrag::grabKnot(SPItem *item, GrPointType point_type, gint point_i, Inkscape::PaintTarget fill_or_stroke, gint x, gint y, guint32 etime)
+{
+ GrDragger *dragger = getDraggerFor(item, point_type, point_i, fill_or_stroke);
+ if (dragger) {
+ dragger->knot->startDragging(dragger->point, x, y, etime);
+ }
+}
+
+/**
+ * Regenerates the draggers list from the current selection; is called when selection is changed or
+ * modified, also when a radial dragger needs to update positions of other draggers in the gradient.
+ */
+void GrDrag::updateDraggers()
+{
+ selected.clear();
+ // delete old draggers
+ for (auto dragger : this->draggers) {
+ delete dragger;
+ }
+ this->draggers.clear();
+
+ g_return_if_fail(this->selection != nullptr);
+ auto list = this->selection->items();
+ for (auto i = list.begin(); i != list.end(); ++i) {
+ SPItem *item = *i;
+ SPStyle *style = item->style;
+
+ if (style && (style->fill.isPaintserver())) {
+ SPPaintServer *server = style->getFillPaintServer();
+ if (auto gradient = dynamic_cast<SPGradient *>(server)) {
+ if (gradient->isSolid() || (gradient->getVector() && gradient->getVector()->isSolid())) {
+ // Suppress "gradientness" of solid paint
+ } else if (SP_IS_LINEARGRADIENT(server)) {
+ addDraggersLinear( SP_LINEARGRADIENT(server), item, Inkscape::FOR_FILL );
+ } else if (SP_IS_RADIALGRADIENT(server)) {
+ addDraggersRadial( SP_RADIALGRADIENT(server), item, Inkscape::FOR_FILL );
+ } else if (SP_IS_MESHGRADIENT(server)) {
+ addDraggersMesh( SP_MESHGRADIENT(server), item, Inkscape::FOR_FILL );
+ }
+ }
+ }
+
+ if (style && (style->stroke.isPaintserver())) {
+ SPPaintServer *server = style->getStrokePaintServer();
+ if (auto gradient = dynamic_cast<SPGradient *>(server)) {
+ if (gradient->isSolid() || (gradient->getVector() && gradient->getVector()->isSolid())) {
+ // Suppress "gradientness" of solid paint
+ } else if (SP_IS_LINEARGRADIENT(server)) {
+ addDraggersLinear( SP_LINEARGRADIENT(server), item, Inkscape::FOR_STROKE );
+ } else if (SP_IS_RADIALGRADIENT(server)) {
+ addDraggersRadial( SP_RADIALGRADIENT(server), item, Inkscape::FOR_STROKE );
+ } else if (SP_IS_MESHGRADIENT(server)) {
+ addDraggersMesh( SP_MESHGRADIENT(server), item, Inkscape::FOR_STROKE );
+ }
+ }
+ }
+ }
+}
+
+
+/**
+ * Refresh draggers, moving and toggling visibility as necessary.
+ * Does not regenerate draggers (as does updateDraggers()).
+ * Only applies to mesh gradients.
+ */
+void GrDrag::refreshDraggers()
+{
+
+ g_return_if_fail(this->selection != nullptr);
+ auto list = this->selection->items();
+ for (auto i = list.begin(); i != list.end(); ++i) {
+ SPItem *item = *i;
+ SPStyle *style = item->style;
+
+ if (style && (style->fill.isPaintserver())) {
+ SPPaintServer *server = style->getFillPaintServer();
+ if ( server && SP_IS_GRADIENT( server ) ) {
+ if ( SP_IS_MESHGRADIENT(server) ) {
+ refreshDraggersMesh( SP_MESHGRADIENT(server), item, Inkscape::FOR_FILL );
+ }
+ }
+ }
+
+ if (style && (style->stroke.isPaintserver())) {
+ SPPaintServer *server = style->getStrokePaintServer();
+ if ( server && SP_IS_GRADIENT( server ) ) {
+ if ( SP_IS_MESHGRADIENT(server) ) {
+ refreshDraggersMesh( SP_MESHGRADIENT(server), item, Inkscape::FOR_STROKE );
+ }
+ }
+ }
+ }
+}
+
+
+/**
+ * Returns true if at least one of the draggers' knots has the mouse hovering above it.
+ */
+bool GrDrag::mouseOver()
+{
+ static bool mouse_out = false;
+ // added knot mouse out for future use
+ for (auto d : this->draggers) {
+ if (d->knot && (d->knot->flags & SP_KNOT_MOUSEOVER)) {
+ mouse_out = true;
+ updateLines();
+ return true;
+ }
+ }
+ if(mouse_out == true){
+ updateLines();
+ mouse_out = false;
+ }
+ return false;
+}
+
+/**
+ * Regenerates the lines list from the current selection; is called on each move of a dragger, so that
+ * lines are always in sync with the actual gradient.
+ */
+void GrDrag::updateLines()
+{
+ for (auto curve : item_curves) {
+ delete curve;
+ }
+ item_curves.clear();
+
+ g_return_if_fail(this->selection != nullptr);
+
+ auto list = this->selection->items();
+ for (auto i = list.begin(); i != list.end(); ++i) {
+ SPItem *item = *i;
+
+ SPStyle *style = item->style;
+
+ if (style && (style->fill.isPaintserver())) {
+ SPPaintServer *server = item->style->getFillPaintServer();
+ if (auto gradient = dynamic_cast<SPGradient *>(server)) {
+ if (gradient->isSolid() || (gradient->getVector() && gradient->getVector()->isSolid())) {
+ // Suppress "gradientness" of solid paint
+ } else if (SP_IS_LINEARGRADIENT(server)) {
+ addLine(item, getGradientCoords(item, POINT_LG_BEGIN, 0, Inkscape::FOR_FILL), getGradientCoords(item, POINT_LG_END, 0, Inkscape::FOR_FILL), Inkscape::FOR_FILL);
+ } else if (SP_IS_RADIALGRADIENT(server)) {
+ Geom::Point center = getGradientCoords(item, POINT_RG_CENTER, 0, Inkscape::FOR_FILL);
+ addLine(item, center, getGradientCoords(item, POINT_RG_R1, 0, Inkscape::FOR_FILL), Inkscape::FOR_FILL);
+ addLine(item, center, getGradientCoords(item, POINT_RG_R2, 0, Inkscape::FOR_FILL), Inkscape::FOR_FILL);
+ } else if (SP_IS_MESHGRADIENT(server)) {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ bool edit_fill = (prefs->getBool("/tools/mesh/edit_fill", true));
+
+ SPMeshGradient *mg = SP_MESHGRADIENT(server);
+
+ if (edit_fill) {
+ guint rows = mg->array.patch_rows();
+ guint columns = mg->array.patch_columns();
+ for ( guint i = 0; i < rows; ++i ) {
+ for ( guint j = 0; j < columns; ++j ) {
+
+ std::vector<Geom::Point> h;
+
+ SPMeshPatchI patch( &(mg->array.nodes), i, j );
+
+ // clockwise around patch, used to find corner dragger
+ int corner0 = i * (columns + 1) + j;
+ int corner1 = corner0 + 1;
+ int corner2 = corner1 + columns + 1;
+ int corner3 = corner2 - 1;
+ // clockwise around patch, used to find handle dragger
+ int handle0 = 2*j + i*(2+4*columns);
+ int handle1 = handle0 + 1;
+ int handle2 = j + i*(2+4*columns) + 2*columns + 1;
+ int handle3 = j + i*(2+4*columns) + 3*columns + 2;
+ int handle4 = handle1 + (2+4*columns);
+ int handle5 = handle0 + (2+4*columns);
+ int handle6 = handle3 - 1;
+ int handle7 = handle2 - 1;
+
+ // Top line
+ h = patch.getPointsForSide( 0 );
+ for( guint p = 0; p < 4; ++p ) {
+ h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine();
+ }
+ addCurve (item, h[0], h[1], h[2], h[3], corner0, corner1, handle0, handle1, Inkscape::FOR_FILL );
+
+ // Right line
+ if( j == columns - 1 ) {
+ h = patch.getPointsForSide( 1 );
+ for( guint p = 0; p < 4; ++p ) {
+ h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine();
+ }
+ addCurve (item, h[0], h[1], h[2], h[3], corner1, corner2, handle2, handle3, Inkscape::FOR_FILL );
+ }
+
+ // Bottom line
+ if( i == rows - 1 ) {
+ h = patch.getPointsForSide( 2 );
+ for( guint p = 0; p < 4; ++p ) {
+ h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine();
+ }
+ addCurve (item, h[0], h[1], h[2], h[3], corner2, corner3, handle4, handle5, Inkscape::FOR_FILL );
+ }
+
+ // Left line
+ h = patch.getPointsForSide( 3 );
+ for( guint p = 0; p < 4; ++p ) {
+ h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine();
+ }
+ addCurve (item, h[0], h[1], h[2], h[3], corner3, corner0, handle6, handle7, Inkscape::FOR_FILL );
+ }
+ }
+ }
+ }
+ }
+ }
+
+ if (style && (style->stroke.isPaintserver())) {
+ SPPaintServer *server = item->style->getStrokePaintServer();
+ if (auto gradient = dynamic_cast<SPGradient *>(server)) {
+ if (gradient->isSolid() || (gradient->getVector() && gradient->getVector()->isSolid())) {
+ // Suppress "gradientness" of solid paint
+ } else if (SP_IS_LINEARGRADIENT(server)) {
+ addLine(item, getGradientCoords(item, POINT_LG_BEGIN, 0, Inkscape::FOR_STROKE), getGradientCoords(item, POINT_LG_END, 0, Inkscape::FOR_STROKE), Inkscape::FOR_STROKE);
+ } else if (SP_IS_RADIALGRADIENT(server)) {
+ Geom::Point center = getGradientCoords(item, POINT_RG_CENTER, 0, Inkscape::FOR_STROKE);
+ addLine(item, center, getGradientCoords(item, POINT_RG_R1, 0, Inkscape::FOR_STROKE), Inkscape::FOR_STROKE);
+ addLine(item, center, getGradientCoords(item, POINT_RG_R2, 0, Inkscape::FOR_STROKE), Inkscape::FOR_STROKE);
+ } else if (SP_IS_MESHGRADIENT(server)) {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ bool edit_stroke = (prefs->getBool("/tools/mesh/edit_stroke", true));
+
+ if (edit_stroke) {
+
+ // MESH FIXME: TURN ROUTINE INTO FUNCTION AND CALL FOR BOTH FILL AND STROKE.
+ SPMeshGradient *mg = SP_MESHGRADIENT(server);
+
+ guint rows = mg->array.patch_rows();
+ guint columns = mg->array.patch_columns();
+ for ( guint i = 0; i < rows; ++i ) {
+ for ( guint j = 0; j < columns; ++j ) {
+
+ std::vector<Geom::Point> h;
+
+ SPMeshPatchI patch( &(mg->array.nodes), i, j );
+
+ // clockwise around patch, used to find corner dragger
+ int corner0 = i * (columns + 1) + j;
+ int corner1 = corner0 + 1;
+ int corner2 = corner1 + columns + 1;
+ int corner3 = corner2 - 1;
+ // clockwise around patch, used to find handle dragger
+ int handle0 = 2*j + i*(2+4*columns);
+ int handle1 = handle0 + 1;
+ int handle2 = j + i*(2+4*columns) + 2*columns + 1;
+ int handle3 = j + i*(2+4*columns) + 3*columns + 2;
+ int handle4 = handle1 + (2+4*columns);
+ int handle5 = handle0 + (2+4*columns);
+ int handle6 = handle3 - 1;
+ int handle7 = handle2 - 1;
+
+ // Top line
+ h = patch.getPointsForSide( 0 );
+ for( guint p = 0; p < 4; ++p ) {
+ h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine();
+ }
+ addCurve (item, h[0], h[1], h[2], h[3], corner0, corner1, handle0, handle1, Inkscape::FOR_STROKE);
+
+ // Right line
+ if( j == columns - 1 ) {
+ h = patch.getPointsForSide( 1 );
+ for( guint p = 0; p < 4; ++p ) {
+ h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine();
+ }
+ addCurve (item, h[0], h[1], h[2], h[3], corner1, corner2, handle2, handle3, Inkscape::FOR_STROKE);
+ }
+
+ // Bottom line
+ if( i == rows - 1 ) {
+ h = patch.getPointsForSide( 2 );
+ for( guint p = 0; p < 4; ++p ) {
+ h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine();
+ }
+ addCurve (item, h[0], h[1], h[2], h[3], corner2, corner3, handle4, handle5, Inkscape::FOR_STROKE);
+ }
+
+ // Left line
+ h = patch.getPointsForSide( 3 );
+ for( guint p = 0; p < 4; ++p ) {
+ h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine();
+ }
+ addCurve (item, h[0], h[1], h[2], h[3], corner3, corner0, handle6, handle7,Inkscape::FOR_STROKE);
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+/**
+ * Regenerates the levels list from the current selection.
+ * Levels correspond to bounding box edges and midpoints.
+ */
+void GrDrag::updateLevels()
+{
+ hor_levels.clear();
+ vert_levels.clear();
+
+ g_return_if_fail (this->selection != nullptr);
+
+ auto list = this->selection->items();
+ for (auto i = list.begin(); i != list.end(); ++i) {
+ SPItem *item = *i;
+ Geom::OptRect rect = item->desktopVisualBounds();
+ if (rect) {
+ // Remember the edges of the bbox and the center axis
+ hor_levels.push_back(rect->min()[Geom::Y]);
+ hor_levels.push_back(rect->max()[Geom::Y]);
+ hor_levels.push_back(rect->midpoint()[Geom::Y]);
+ vert_levels.push_back(rect->min()[Geom::X]);
+ vert_levels.push_back(rect->max()[Geom::X]);
+ vert_levels.push_back(rect->midpoint()[Geom::X]);
+ }
+ }
+}
+
+void GrDrag::selected_reverse_vector()
+{
+ if (selected.empty())
+ return;
+
+ for(auto draggable : (*(selected.begin()))->draggables) {
+ sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke);
+ }
+}
+
+void GrDrag::selected_move_nowrite(double x, double y, bool scale_radial)
+{
+ selected_move (x, y, false, scale_radial);
+}
+
+void GrDrag::selected_move(double x, double y, bool write_repr, bool scale_radial)
+{
+ if (selected.empty())
+ return;
+
+ bool did = false;
+
+ for(auto d : selected) {
+ if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) {
+ // if this is an endpoint,
+
+ // Moving an rg center moves its focus and radii as well.
+ // therefore, if this is a focus or radius and if selection
+ // contains the center as well, do not move this one
+ if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) ||
+ (d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) {
+ bool skip_radius_with_center = false;
+ for(auto d_new : selected) {
+ if (d_new->isA (( d->draggables[0])->item,
+ POINT_RG_CENTER,
+ 0,
+ (d->draggables[0])->fill_or_stroke)) {
+ // FIXME: here we take into account only the first draggable!
+ skip_radius_with_center = true;
+ }
+ }
+ if (skip_radius_with_center)
+ continue;
+ }
+
+ did = true;
+ Geom::Point p_old = d->point;
+ d->point += Geom::Point (x, y);
+ d->point_original = d->point;
+ d->knot->moveto(d->point);
+
+ d->fireDraggables (write_repr, scale_radial);
+ d->moveMeshHandles( p_old, MG_NODE_NO_SCALE );
+ d->updateDependencies(write_repr);
+ }
+ }
+
+ if (write_repr && did) {
+ // we did an undoable action
+ DocumentUndo::maybeDone(desktop->getDocument(), "grmoveh", _("Move gradient handle(s)"), INKSCAPE_ICON("color-gradient"));
+ return;
+ }
+
+ if (!did) { // none of the end draggers are selected, so let's try to move the mids
+
+ GrDragger *dragger = *(selected.begin());
+ // a midpoint dragger can (logically) only contain one GrDraggable
+ GrDraggable *draggable = dragger->draggables[0];
+
+ Geom::Point begin(0,0), end(0,0);
+ Geom::Point low_lim(0,0), high_lim(0,0);
+
+ SPObject *server = draggable->getServer();
+ std::vector<GrDragger *> moving;
+ gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, moving);
+
+ Geom::LineSegment ls(low_lim, high_lim);
+ Geom::Point p = ls.pointAt(ls.nearestTime(dragger->point + Geom::Point(x,y)));
+ Geom::Point displacement = p - dragger->point;
+
+ for(auto drg : moving) {
+ SPKnot *drgknot = drg->knot;
+ drg->point += displacement;
+ drgknot->moveto(drg->point);
+ drg->fireDraggables (true);
+ drg->updateDependencies(true);
+ did = true;
+ }
+
+ if (write_repr && did) {
+ // we did an undoable action
+ DocumentUndo::maybeDone(desktop->getDocument(), "grmovem", _("Move gradient mid stop(s)"), INKSCAPE_ICON("color-gradient"));
+ }
+ }
+}
+
+void GrDrag::selected_move_screen(double x, double y)
+{
+ gdouble zoom = desktop->current_zoom();
+ gdouble zx = x / zoom;
+ gdouble zy = y / zoom;
+
+ selected_move (zx, zy);
+}
+
+/**
+ * Handle arrow key events
+ * @param event Event with type GDK_KEY_PRESS
+ * @return True if the event was handled, false otherwise
+ */
+bool GrDrag::key_press_handler(GdkEvent *event)
+{
+ if (MOD__CTRL(event)) {
+ return false;
+ }
+
+ auto keyval = Inkscape::UI::Tools::get_latin_keyval(&event->key);
+ double x_dir = 0;
+ double y_dir = 0;
+
+ switch (keyval) {
+ case GDK_KEY_Left: // move handle left
+ case GDK_KEY_KP_Left:
+ case GDK_KEY_KP_4:
+ x_dir = -1;
+ break;
+
+ case GDK_KEY_Up: // move handle up
+ case GDK_KEY_KP_Up:
+ case GDK_KEY_KP_8:
+ y_dir = 1;
+ break;
+
+ case GDK_KEY_Right: // move handle right
+ case GDK_KEY_KP_Right:
+ case GDK_KEY_KP_6:
+ x_dir = 1;
+ break;
+
+ case GDK_KEY_Down: // move handle down
+ case GDK_KEY_KP_Down:
+ case GDK_KEY_KP_2:
+ y_dir = -1;
+ break;
+
+ default:
+ return false;
+ }
+
+ y_dir *= -desktop->yaxisdir();
+
+ gint mul = 1 + desktop->canvas->gobble_key_events(keyval, 0); // with any mask
+
+ if (MOD__SHIFT(event)) {
+ mul *= 10;
+ }
+
+ if (MOD__ALT(event)) {
+ selected_move_screen(mul * x_dir, mul * y_dir);
+ } else {
+ auto *prefs = Inkscape::Preferences::get();
+ auto nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000, "px"); // in px
+
+ mul *= nudge;
+ selected_move(mul * x_dir, mul * y_dir);
+ }
+
+ return true;
+}
+
+/**
+ * Select the knot next to the last selected one and deselect all other selected.
+ */
+GrDragger *GrDrag::select_next()
+{
+ GrDragger *d = nullptr;
+ if (selected.empty() || (++find(draggers.begin(),draggers.end(),*(selected.begin())))==draggers.end()) {
+ if (!draggers.empty())
+ d = draggers[0];
+ } else {
+ d = *(++find(draggers.begin(),draggers.end(),*(selected.begin())));
+ }
+ if (d)
+ setSelected (d);
+ return d;
+}
+
+/**
+ * Select the knot previous from the last selected one and deselect all other selected.
+ */
+GrDragger *GrDrag::select_prev()
+{
+ GrDragger *d = nullptr;
+ if (selected.empty() || draggers[0] == (*(selected.begin()))) {
+ if (!draggers.empty())
+ d = draggers[draggers.size()-1];
+ } else {
+ d = *(--find(draggers.begin(),draggers.end(),*(selected.begin())));
+ }
+ if (d)
+ setSelected (d);
+ return d;
+}
+
+
+// FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan)
+void GrDrag::deleteSelected(bool just_one)
+{
+ if (selected.empty()) return;
+
+ SPDocument *document = nullptr;
+
+ struct StructStopInfo {
+ SPStop * spstop;
+ GrDraggable * draggable;
+ SPGradient * gradient;
+ SPGradient * vector;
+ };
+
+ std::vector<SPStop *> midstoplist;// list of stops that must be deleted (will be deleted first)
+ std::vector<StructStopInfo *> endstoplist;// list of stops that must be deleted
+
+ while (!selected.empty()) {
+ GrDragger *dragger = *(selected.begin());
+ for(auto draggable : dragger->draggables) {
+ SPGradient *gradient = getGradient(draggable->item, draggable->fill_or_stroke);
+ SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
+
+ switch (draggable->point_type) {
+ case POINT_LG_MID:
+ case POINT_RG_MID1:
+ case POINT_RG_MID2:
+ {
+ SPStop *stop = sp_get_stop_i(vector, draggable->point_i);
+ // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected)
+ bool present = false;
+ for (auto i:midstoplist) {
+ if ( i == stop ) {
+ present = true;
+ break; // no need to search further.
+ }
+ }
+ if (!present)
+ midstoplist.push_back(stop);
+ }
+ break;
+ case POINT_LG_BEGIN:
+ case POINT_LG_END:
+ case POINT_RG_CENTER:
+ case POINT_RG_R1:
+ case POINT_RG_R2:
+ {
+ SPStop *stop = nullptr;
+ if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) {
+ stop = vector->getFirstStop();
+ } else {
+ stop = sp_last_stop(vector);
+ }
+ if (stop) {
+ StructStopInfo *stopinfo = new StructStopInfo;
+ stopinfo->spstop = stop;
+ stopinfo->draggable = draggable;
+ stopinfo->gradient = gradient;
+ stopinfo->vector = vector;
+ // check if already present in list. (e.g. when both R1 and R2 were selected)
+ bool present = false;
+ for (auto i : endstoplist) {
+ if ( i->spstop == stopinfo->spstop ) {
+ present = true;
+ break; // no need to search further.
+ }
+ }
+ if (!present)
+ endstoplist.push_back(stopinfo);
+ else
+ delete stopinfo;
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+ selected.erase(dragger);
+ if ( just_one ) break; // iterate once if just_one is set.
+ }
+ for (auto stop:midstoplist) {
+ document = stop->document;
+ Inkscape::XML::Node * parent = stop->getRepr()->parent();
+ parent->removeChild(stop->getRepr());
+ }
+
+ for (auto stopinfo:endstoplist) {
+ document = stopinfo->spstop->document;
+
+ // 2 is the minimum, cannot delete more than that without deleting the whole vector
+ // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop
+ // manually count the children, don't know if there already exists a function for this...
+ int len = 0;
+ for (auto& child: stopinfo->vector->children)
+ {
+ if ( SP_IS_STOP(&child) ) {
+ len ++;
+ }
+ }
+ if (len > 2)
+ {
+ switch (stopinfo->draggable->point_type) {
+ case POINT_LG_BEGIN:
+ {
+ stopinfo->vector->getRepr()->removeChild(stopinfo->spstop->getRepr());
+
+ SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
+ Geom::Point oldbegin = Geom::Point (lg->x1.computed, lg->y1.computed);
+ Geom::Point end = Geom::Point (lg->x2.computed, lg->y2.computed);
+ SPStop *stop = stopinfo->vector->getFirstStop();
+ gdouble offset = stop->offset;
+ Geom::Point newbegin = oldbegin + offset * (end - oldbegin);
+ lg->x1.computed = newbegin[Geom::X];
+ lg->y1.computed = newbegin[Geom::Y];
+
+ Inkscape::XML::Node *repr = stopinfo->gradient->getRepr();
+ repr->setAttributeSvgDouble("x1", lg->x1.computed);
+ repr->setAttributeSvgDouble("y1", lg->y1.computed);
+ stop->offset = 0;
+ stop->getRepr()->setAttributeCssDouble("offset", 0);
+
+ // iterate through midstops to set new offset values such that they won't move on canvas.
+ SPStop *laststop = sp_last_stop(stopinfo->vector);
+ stop = stop->getNextStop();
+ while ( stop != laststop ) {
+ stop->offset = (stop->offset - offset)/(1 - offset);
+ stop->getRepr()->setAttributeCssDouble("offset", stop->offset);
+ stop = stop->getNextStop();
+ }
+ }
+ break;
+ case POINT_LG_END:
+ {
+ stopinfo->vector->getRepr()->removeChild(stopinfo->spstop->getRepr());
+
+ SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
+ Geom::Point begin = Geom::Point (lg->x1.computed, lg->y1.computed);
+ Geom::Point oldend = Geom::Point (lg->x2.computed, lg->y2.computed);
+ SPStop *laststop = sp_last_stop(stopinfo->vector);
+ gdouble offset = laststop->offset;
+ Geom::Point newend = begin + offset * (oldend - begin);
+ lg->x2.computed = newend[Geom::X];
+ lg->y2.computed = newend[Geom::Y];
+
+ Inkscape::XML::Node *repr = stopinfo->gradient->getRepr();
+ repr->setAttributeSvgDouble("x2", lg->x2.computed);
+ repr->setAttributeSvgDouble("y2", lg->y2.computed);
+ laststop->offset = 1;
+ laststop->getRepr()->setAttributeCssDouble("offset", 1);
+
+ // iterate through midstops to set new offset values such that they won't move on canvas.
+ SPStop *stop = stopinfo->vector->getFirstStop();
+ stop = stop->getNextStop();
+ while ( stop != laststop ) {
+ stop->offset = stop->offset / offset;
+ stop->getRepr()->setAttributeCssDouble("offset", stop->offset);
+ stop = stop->getNextStop();
+ }
+ }
+ break;
+ case POINT_RG_CENTER:
+ {
+ SPStop *newfirst = stopinfo->spstop->getNextStop();
+ if (newfirst) {
+ newfirst->offset = 0;
+ newfirst->getRepr()->setAttributeCssDouble("offset", 0);
+ }
+ stopinfo->vector->getRepr()->removeChild(stopinfo->spstop->getRepr());
+ }
+ break;
+ case POINT_RG_R1:
+ case POINT_RG_R2:
+ {
+ stopinfo->vector->getRepr()->removeChild(stopinfo->spstop->getRepr());
+
+ SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient);
+ double oldradius = rg->r.computed;
+ SPStop *laststop = sp_last_stop(stopinfo->vector);
+ gdouble offset = laststop->offset;
+ double newradius = offset * oldradius;
+ rg->r.computed = newradius;
+
+ Inkscape::XML::Node *repr = rg->getRepr();
+ repr->setAttributeSvgDouble("r", rg->r.computed);
+ laststop->offset = 1;
+ laststop->getRepr()->setAttributeCssDouble("offset", 1);
+
+ // iterate through midstops to set new offset values such that they won't move on canvas.
+ SPStop *stop = stopinfo->vector->getFirstStop();
+ stop = stop->getNextStop();
+ while ( stop != laststop ) {
+ stop->offset = stop->offset / offset;
+ stop->getRepr()->setAttributeCssDouble("offset", stop->offset);
+ stop = stop->getNextStop();
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ else
+ { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node?
+ SPCSSAttr *css = sp_repr_css_attr_new ();
+
+ // stopinfo->spstop is the selected stop
+ Inkscape::XML::Node *unselectedrepr = stopinfo->vector->getRepr()->firstChild();
+ if (unselectedrepr == stopinfo->spstop->getRepr() ) {
+ unselectedrepr = unselectedrepr->next();
+ }
+
+ if (unselectedrepr == nullptr) {
+ if (stopinfo->draggable->fill_or_stroke == Inkscape::FOR_FILL) {
+ sp_repr_css_unset_property (css, "fill");
+ } else {
+ sp_repr_css_unset_property (css, "stroke");
+ }
+ } else {
+ SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style");
+ if (stopinfo->draggable->fill_or_stroke == Inkscape::FOR_FILL) {
+ sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
+ sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
+ } else {
+ sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
+ sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
+ }
+ sp_repr_css_attr_unref (stopcss);
+ }
+
+ sp_repr_css_change(stopinfo->draggable->item->getRepr(), css, "style");
+ sp_repr_css_attr_unref (css);
+ }
+
+ delete stopinfo;
+ }
+
+ if (document) {
+ DocumentUndo::done( document, _("Delete gradient stop(s)"), INKSCAPE_ICON("color-gradient"));
+ }
+}
+
+
+/*
+ Local Variables:
+ mode:c++
+ c-file-style:"stroustrup"
+ c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+ indent-tabs-mode:nil
+ fill-column:99
+ End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :